From 3e7832e1a77c1c58caede11c89b6ad033784a4e3 Mon Sep 17 00:00:00 2001 From: water111 <48171810+water111@users.noreply.github.com> Date: Sat, 18 Jun 2022 15:07:40 -0400 Subject: [PATCH] [custom levels] add 3rdparty library for gltf files (#1481) --- CMakeLists.txt | 2 + game/graphics/display.h | 18 +- third-party/tiny_gltf/CMakeLists.txt | 9 + third-party/tiny_gltf/stb_image.h | 7530 ++++++++++++++++++++++ third-party/tiny_gltf/stb_image_write.h | 1621 +++++ third-party/tiny_gltf/tiny_gltf.cpp | 4 + third-party/tiny_gltf/tiny_gltf.h | 7748 +++++++++++++++++++++++ tools/CMakeLists.txt | 1 + tools/build_level/CMakeLists.txt | 4 + tools/build_level/main.cpp | 3 + 10 files changed, 16931 insertions(+), 9 deletions(-) create mode 100644 third-party/tiny_gltf/CMakeLists.txt create mode 100644 third-party/tiny_gltf/stb_image.h create mode 100644 third-party/tiny_gltf/stb_image_write.h create mode 100644 third-party/tiny_gltf/tiny_gltf.cpp create mode 100644 third-party/tiny_gltf/tiny_gltf.h create mode 100644 tools/build_level/CMakeLists.txt create mode 100644 tools/build_level/main.cpp diff --git a/CMakeLists.txt b/CMakeLists.txt index e8c2e3c65e..5ac40a0be8 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -162,6 +162,8 @@ add_subdirectory(third-party/lzokay EXCLUDE_FROM_ALL) # build format library add_subdirectory(third-party/fmt EXCLUDE_FROM_ALL) +add_subdirectory(third-party/tiny_gltf EXCLUDE_FROM_ALL) + # discord rich presence include_directories(third-party/discord-rpc/include) add_subdirectory(third-party/discord-rpc EXCLUDE_FROM_ALL) diff --git a/game/graphics/display.h b/game/graphics/display.h index 6c66795892..f0943b8573 100644 --- a/game/graphics/display.h +++ b/game/graphics/display.h @@ -40,15 +40,15 @@ class GfxDisplay { public: virtual ~GfxDisplay() {} - virtual void* get_window() const __NYI_DEF; - virtual void set_size(int w, int h) __NYI_DEF; - virtual void update_fullscreen(GfxDisplayMode mode, int screen) __NYI_DEF; - virtual void get_scale(float* x, float* y) __NYI_DEF; - virtual void get_screen_size(int vmode_idx, s32* w, s32* h, s32* c) __NYI_DEF; - virtual void get_position(int* x, int* y) __NYI_DEF; - virtual void get_size(int* w, int* h) __NYI_DEF; - virtual GfxDisplayMode get_fullscreen() __NYI_DEF; - virtual void render() __NYI_DEF; + virtual void* get_window() const = 0; + virtual void set_size(int w, int h) = 0; + virtual void update_fullscreen(GfxDisplayMode mode, int screen) = 0; + virtual void get_scale(float* x, float* y) = 0; + virtual void get_screen_size(int vmode_idx, s32* w, s32* h, s32* c) = 0; + virtual void get_position(int* x, int* y) = 0; + virtual void get_size(int* w, int* h) = 0; + virtual GfxDisplayMode get_fullscreen() = 0; + virtual void render() = 0; bool is_active() const { return get_window() != nullptr; } void set_title(const char* title); const char* title() const { return m_title; } diff --git a/third-party/tiny_gltf/CMakeLists.txt b/third-party/tiny_gltf/CMakeLists.txt new file mode 100644 index 0000000000..eb0f926d45 --- /dev/null +++ b/third-party/tiny_gltf/CMakeLists.txt @@ -0,0 +1,9 @@ +if (UNIX) + set(CMAKE_CXX_FLAGS "-O3") +else () + set(CMAKE_CXX_FLAGS "/EHsc") +endif (UNIX) + +include_directories(../) +add_library(tiny_gltf tiny_gltf.cpp) + diff --git a/third-party/tiny_gltf/stb_image.h b/third-party/tiny_gltf/stb_image.h new file mode 100644 index 0000000000..db2b1bcdf4 --- /dev/null +++ b/third-party/tiny_gltf/stb_image.h @@ -0,0 +1,7530 @@ +/* stb_image - v2.21 - public domain image loader - http://nothings.org/stb + no warranty implied; use at your own risk + + Do this: + #define STB_IMAGE_IMPLEMENTATION + before you include this file in *one* C or C++ file to create the implementation. + + // i.e. it should look like this: + #include ... + #include ... + #include ... + #define STB_IMAGE_IMPLEMENTATION + #include "stb_image.h" + + You can #define STBI_ASSERT(x) before the #include to avoid using assert.h. + And #define STBI_MALLOC, STBI_REALLOC, and STBI_FREE to avoid using malloc,realloc,free + + + QUICK NOTES: + Primarily of interest to game developers and other people who can + avoid problematic images and only need the trivial interface + + JPEG baseline & progressive (12 bpc/arithmetic not supported, same as stock IJG lib) + PNG 1/2/4/8/16-bit-per-channel + + TGA (not sure what subset, if a subset) + BMP non-1bpp, non-RLE + PSD (composited view only, no extra channels, 8/16 bit-per-channel) + + GIF (*comp always reports as 4-channel) + HDR (radiance rgbE format) + PIC (Softimage PIC) + PNM (PPM and PGM binary only) + + Animated GIF still needs a proper API, but here's one way to do it: + http://gist.github.com/urraka/685d9a6340b26b830d49 + + - decode from memory or through FILE (define STBI_NO_STDIO to remove code) + - decode from arbitrary I/O callbacks + - SIMD acceleration on x86/x64 (SSE2) and ARM (NEON) + + Full documentation under "DOCUMENTATION" below. + + +LICENSE + + See end of file for license information. + +RECENT REVISION HISTORY: + + 2.21 (2019-02-25) fix typo in comment + 2.20 (2019-02-07) support utf8 filenames in Windows; fix warnings and platform ifdefs + 2.19 (2018-02-11) fix warning + 2.18 (2018-01-30) fix warnings + 2.17 (2018-01-29) bugfix, 1-bit BMP, 16-bitness query, fix warnings + 2.16 (2017-07-23) all functions have 16-bit variants; optimizations; bugfixes + 2.15 (2017-03-18) fix png-1,2,4; all Imagenet JPGs; no runtime SSE detection on GCC + 2.14 (2017-03-03) remove deprecated STBI_JPEG_OLD; fixes for Imagenet JPGs + 2.13 (2016-12-04) experimental 16-bit API, only for PNG so far; fixes + 2.12 (2016-04-02) fix typo in 2.11 PSD fix that caused crashes + 2.11 (2016-04-02) 16-bit PNGS; enable SSE2 in non-gcc x64 + RGB-format JPEG; remove white matting in PSD; + allocate large structures on the stack; + correct channel count for PNG & BMP + 2.10 (2016-01-22) avoid warning introduced in 2.09 + 2.09 (2016-01-16) 16-bit TGA; comments in PNM files; STBI_REALLOC_SIZED + + See end of file for full revision history. + + + ============================ Contributors ========================= + + Image formats Extensions, features + Sean Barrett (jpeg, png, bmp) Jetro Lauha (stbi_info) + Nicolas Schulz (hdr, psd) Martin "SpartanJ" Golini (stbi_info) + Jonathan Dummer (tga) James "moose2000" Brown (iPhone PNG) + Jean-Marc Lienher (gif) Ben "Disch" Wenger (io callbacks) + Tom Seddon (pic) Omar Cornut (1/2/4-bit PNG) + Thatcher Ulrich (psd) Nicolas Guillemot (vertical flip) + Ken Miller (pgm, ppm) Richard Mitton (16-bit PSD) + github:urraka (animated gif) Junggon Kim (PNM comments) + Christopher Forseth (animated gif) Daniel Gibson (16-bit TGA) + socks-the-fox (16-bit PNG) + Jeremy Sawicki (handle all ImageNet JPGs) + Optimizations & bugfixes Mikhail Morozov (1-bit BMP) + Fabian "ryg" Giesen Anael Seghezzi (is-16-bit query) + Arseny Kapoulkine + John-Mark Allen + Carmelo J Fdez-Aguera + + Bug & warning fixes + Marc LeBlanc David Woo Guillaume George Martins Mozeiko + Christpher Lloyd Jerry Jansson Joseph Thomson Phil Jordan + Dave Moore Roy Eltham Hayaki Saito Nathan Reed + Won Chun Luke Graham Johan Duparc Nick Verigakis + the Horde3D community Thomas Ruf Ronny Chevalier github:rlyeh + Janez Zemva John Bartholomew Michal Cichon github:romigrou + Jonathan Blow Ken Hamada Tero Hanninen github:svdijk + Laurent Gomila Cort Stratton Sergio Gonzalez github:snagar + Aruelien Pocheville Thibault Reuille Cass Everitt github:Zelex + Ryamond Barbiero Paul Du Bois Engin Manap github:grim210 + Aldo Culquicondor Philipp Wiesemann Dale Weiler github:sammyhw + Oriol Ferrer Mesia Josh Tobin Matthew Gregan github:phprus + Julian Raschke Gregory Mullen Baldur Karlsson github:poppolopoppo + Christian Floisand Kevin Schmidt JR Smith github:darealshinji + Blazej Dariusz Roszkowski github:Michaelangel007 +*/ + +#ifndef STBI_INCLUDE_STB_IMAGE_H +#define STBI_INCLUDE_STB_IMAGE_H + +// DOCUMENTATION +// +// Limitations: +// - no 12-bit-per-channel JPEG +// - no JPEGs with arithmetic coding +// - GIF always returns *comp=4 +// +// Basic usage (see HDR discussion below for HDR usage): +// int x,y,n; +// unsigned char *data = stbi_load(filename, &x, &y, &n, 0); +// // ... process data if not NULL ... +// // ... x = width, y = height, n = # 8-bit components per pixel ... +// // ... replace '0' with '1'..'4' to force that many components per pixel +// // ... but 'n' will always be the number that it would have been if you said 0 +// stbi_image_free(data) +// +// Standard parameters: +// int *x -- outputs image width in pixels +// int *y -- outputs image height in pixels +// int *channels_in_file -- outputs # of image components in image file +// int desired_channels -- if non-zero, # of image components requested in result +// +// The return value from an image loader is an 'unsigned char *' which points +// to the pixel data, or NULL on an allocation failure or if the image is +// corrupt or invalid. The pixel data consists of *y scanlines of *x pixels, +// with each pixel consisting of N interleaved 8-bit components; the first +// pixel pointed to is top-left-most in the image. There is no padding between +// image scanlines or between pixels, regardless of format. The number of +// components N is 'desired_channels' if desired_channels is non-zero, or +// *channels_in_file otherwise. If desired_channels is non-zero, +// *channels_in_file has the number of components that _would_ have been +// output otherwise. E.g. if you set desired_channels to 4, you will always +// get RGBA output, but you can check *channels_in_file to see if it's trivially +// opaque because e.g. there were only 3 channels in the source image. +// +// An output image with N components has the following components interleaved +// in this order in each pixel: +// +// N=#comp components +// 1 grey +// 2 grey, alpha +// 3 red, green, blue +// 4 red, green, blue, alpha +// +// If image loading fails for any reason, the return value will be NULL, +// and *x, *y, *channels_in_file will be unchanged. The function +// stbi_failure_reason() can be queried for an extremely brief, end-user +// unfriendly explanation of why the load failed. Define STBI_NO_FAILURE_STRINGS +// to avoid compiling these strings at all, and STBI_FAILURE_USERMSG to get slightly +// more user-friendly ones. +// +// Paletted PNG, BMP, GIF, and PIC images are automatically depalettized. +// +// =========================================================================== +// +// UNICODE: +// +// If compiling for Windows and you wish to use Unicode filenames, compile +// with +// #define STBI_WINDOWS_UTF8 +// and pass utf8-encoded filenames. Call stbi_convert_wchar_to_utf8 to convert +// Windows wchar_t filenames to utf8. +// +// =========================================================================== +// +// Philosophy +// +// stb libraries are designed with the following priorities: +// +// 1. easy to use +// 2. easy to maintain +// 3. good performance +// +// Sometimes I let "good performance" creep up in priority over "easy to maintain", +// and for best performance I may provide less-easy-to-use APIs that give higher +// performance, in addition to the easy-to-use ones. Nevertheless, it's important +// to keep in mind that from the standpoint of you, a client of this library, +// all you care about is #1 and #3, and stb libraries DO NOT emphasize #3 above all. +// +// Some secondary priorities arise directly from the first two, some of which +// provide more explicit reasons why performance can't be emphasized. +// +// - Portable ("ease of use") +// - Small source code footprint ("easy to maintain") +// - No dependencies ("ease of use") +// +// =========================================================================== +// +// I/O callbacks +// +// I/O callbacks allow you to read from arbitrary sources, like packaged +// files or some other source. Data read from callbacks are processed +// through a small internal buffer (currently 128 bytes) to try to reduce +// overhead. +// +// The three functions you must define are "read" (reads some bytes of data), +// "skip" (skips some bytes of data), "eof" (reports if the stream is at the end). +// +// =========================================================================== +// +// SIMD support +// +// The JPEG decoder will try to automatically use SIMD kernels on x86 when +// supported by the compiler. For ARM Neon support, you must explicitly +// request it. +// +// (The old do-it-yourself SIMD API is no longer supported in the current +// code.) +// +// On x86, SSE2 will automatically be used when available based on a run-time +// test; if not, the generic C versions are used as a fall-back. On ARM targets, +// the typical path is to have separate builds for NEON and non-NEON devices +// (at least this is true for iOS and Android). Therefore, the NEON support is +// toggled by a build flag: define STBI_NEON to get NEON loops. +// +// If for some reason you do not want to use any of SIMD code, or if +// you have issues compiling it, you can disable it entirely by +// defining STBI_NO_SIMD. +// +// =========================================================================== +// +// HDR image support (disable by defining STBI_NO_HDR) +// +// stb_image supports loading HDR images in general, and currently the Radiance +// .HDR file format specifically. You can still load any file through the existing +// interface; if you attempt to load an HDR file, it will be automatically remapped +// to LDR, assuming gamma 2.2 and an arbitrary scale factor defaulting to 1; +// both of these constants can be reconfigured through this interface: +// +// stbi_hdr_to_ldr_gamma(2.2f); +// stbi_hdr_to_ldr_scale(1.0f); +// +// (note, do not use _inverse_ constants; stbi_image will invert them +// appropriately). +// +// Additionally, there is a new, parallel interface for loading files as +// (linear) floats to preserve the full dynamic range: +// +// float *data = stbi_loadf(filename, &x, &y, &n, 0); +// +// If you load LDR images through this interface, those images will +// be promoted to floating point values, run through the inverse of +// constants corresponding to the above: +// +// stbi_ldr_to_hdr_scale(1.0f); +// stbi_ldr_to_hdr_gamma(2.2f); +// +// Finally, given a filename (or an open file or memory block--see header +// file for details) containing image data, you can query for the "most +// appropriate" interface to use (that is, whether the image is HDR or +// not), using: +// +// stbi_is_hdr(char *filename); +// +// =========================================================================== +// +// iPhone PNG support: +// +// By default we convert iphone-formatted PNGs back to RGB, even though +// they are internally encoded differently. You can disable this conversion +// by calling stbi_convert_iphone_png_to_rgb(0), in which case +// you will always just get the native iphone "format" through (which +// is BGR stored in RGB). +// +// Call stbi_set_unpremultiply_on_load(1) as well to force a divide per +// pixel to remove any premultiplied alpha *only* if the image file explicitly +// says there's premultiplied data (currently only happens in iPhone images, +// and only if iPhone convert-to-rgb processing is on). +// +// =========================================================================== +// +// ADDITIONAL CONFIGURATION +// +// - You can suppress implementation of any of the decoders to reduce +// your code footprint by #defining one or more of the following +// symbols before creating the implementation. +// +// STBI_NO_JPEG +// STBI_NO_PNG +// STBI_NO_BMP +// STBI_NO_PSD +// STBI_NO_TGA +// STBI_NO_GIF +// STBI_NO_HDR +// STBI_NO_PIC +// STBI_NO_PNM (.ppm and .pgm) +// +// - You can request *only* certain decoders and suppress all other ones +// (this will be more forward-compatible, as addition of new decoders +// doesn't require you to disable them explicitly): +// +// STBI_ONLY_JPEG +// STBI_ONLY_PNG +// STBI_ONLY_BMP +// STBI_ONLY_PSD +// STBI_ONLY_TGA +// STBI_ONLY_GIF +// STBI_ONLY_HDR +// STBI_ONLY_PIC +// STBI_ONLY_PNM (.ppm and .pgm) +// +// - If you use STBI_NO_PNG (or _ONLY_ without PNG), and you still +// want the zlib decoder to be available, #define STBI_SUPPORT_ZLIB +// + + +#ifndef STBI_NO_STDIO +#include +#endif // STBI_NO_STDIO + +#define STBI_VERSION 1 + +enum +{ + STBI_default = 0, // only used for desired_channels + + STBI_grey = 1, + STBI_grey_alpha = 2, + STBI_rgb = 3, + STBI_rgb_alpha = 4 +}; + +#include +typedef unsigned char stbi_uc; +typedef unsigned short stbi_us; + +#ifdef __cplusplus +extern "C" { +#endif + +#ifdef STB_IMAGE_STATIC +#define STBIDEF static +#else +#define STBIDEF extern +#endif + +////////////////////////////////////////////////////////////////////////////// +// +// PRIMARY API - works on images of any type +// + +// +// load image by filename, open file, or memory buffer +// + +typedef struct +{ + int (*read) (void *user,char *data,int size); // fill 'data' with 'size' bytes. return number of bytes actually read + void (*skip) (void *user,int n); // skip the next 'n' bytes, or 'unget' the last -n bytes if negative + int (*eof) (void *user); // returns nonzero if we are at end of file/data +} stbi_io_callbacks; + +//////////////////////////////////// +// +// 8-bits-per-channel interface +// + +STBIDEF stbi_uc *stbi_load_from_memory (stbi_uc const *buffer, int len , int *x, int *y, int *channels_in_file, int desired_channels); +STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk , void *user, int *x, int *y, int *channels_in_file, int desired_channels); + +#ifndef STBI_NO_STDIO +STBIDEF stbi_uc *stbi_load (char const *filename, int *x, int *y, int *channels_in_file, int desired_channels); +STBIDEF stbi_uc *stbi_load_from_file (FILE *f, int *x, int *y, int *channels_in_file, int desired_channels); +// for stbi_load_from_file, file pointer is left pointing immediately after image +#endif + +#ifndef STBI_NO_GIF +STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp); +#endif + +#ifdef STBI_WINDOWS_UTF8 +STBIDEF int stbi_convert_wchar_to_utf8(char *buffer, size_t bufferlen, const wchar_t* input); +#endif + +//////////////////////////////////// +// +// 16-bits-per-channel interface +// + +STBIDEF stbi_us *stbi_load_16_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels); +STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels); + +#ifndef STBI_NO_STDIO +STBIDEF stbi_us *stbi_load_16 (char const *filename, int *x, int *y, int *channels_in_file, int desired_channels); +STBIDEF stbi_us *stbi_load_from_file_16(FILE *f, int *x, int *y, int *channels_in_file, int desired_channels); +#endif + +//////////////////////////////////// +// +// float-per-channel interface +// +#ifndef STBI_NO_LINEAR +STBIDEF float *stbi_loadf_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels); +STBIDEF float *stbi_loadf_from_callbacks (stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels); + +#ifndef STBI_NO_STDIO +STBIDEF float *stbi_loadf (char const *filename, int *x, int *y, int *channels_in_file, int desired_channels); +STBIDEF float *stbi_loadf_from_file (FILE *f, int *x, int *y, int *channels_in_file, int desired_channels); +#endif +#endif + +#ifndef STBI_NO_HDR +STBIDEF void stbi_hdr_to_ldr_gamma(float gamma); +STBIDEF void stbi_hdr_to_ldr_scale(float scale); +#endif // STBI_NO_HDR + +#ifndef STBI_NO_LINEAR +STBIDEF void stbi_ldr_to_hdr_gamma(float gamma); +STBIDEF void stbi_ldr_to_hdr_scale(float scale); +#endif // STBI_NO_LINEAR + +// stbi_is_hdr is always defined, but always returns false if STBI_NO_HDR +STBIDEF int stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user); +STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len); +#ifndef STBI_NO_STDIO +STBIDEF int stbi_is_hdr (char const *filename); +STBIDEF int stbi_is_hdr_from_file(FILE *f); +#endif // STBI_NO_STDIO + + +// get a VERY brief reason for failure +// NOT THREADSAFE +STBIDEF const char *stbi_failure_reason (void); + +// free the loaded image -- this is just free() +STBIDEF void stbi_image_free (void *retval_from_stbi_load); + +// get image dimensions & components without fully decoding +STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp); +STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp); +STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len); +STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *clbk, void *user); + +#ifndef STBI_NO_STDIO +STBIDEF int stbi_info (char const *filename, int *x, int *y, int *comp); +STBIDEF int stbi_info_from_file (FILE *f, int *x, int *y, int *comp); +STBIDEF int stbi_is_16_bit (char const *filename); +STBIDEF int stbi_is_16_bit_from_file(FILE *f); +#endif + + + +// for image formats that explicitly notate that they have premultiplied alpha, +// we just return the colors as stored in the file. set this flag to force +// unpremultiplication. results are undefined if the unpremultiply overflow. +STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply); + +// indicate whether we should process iphone images back to canonical format, +// or just pass them through "as-is" +STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert); + +// flip the image vertically, so the first pixel in the output array is the bottom left +STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip); + +// ZLIB client - used by PNG, available for other purposes + +STBIDEF char *stbi_zlib_decode_malloc_guesssize(const char *buffer, int len, int initial_size, int *outlen); +STBIDEF char *stbi_zlib_decode_malloc_guesssize_headerflag(const char *buffer, int len, int initial_size, int *outlen, int parse_header); +STBIDEF char *stbi_zlib_decode_malloc(const char *buffer, int len, int *outlen); +STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, const char *ibuffer, int ilen); + +STBIDEF char *stbi_zlib_decode_noheader_malloc(const char *buffer, int len, int *outlen); +STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen); + + +#ifdef __cplusplus +} +#endif + +// +// +//// end header file ///////////////////////////////////////////////////// +#endif // STBI_INCLUDE_STB_IMAGE_H + +#ifdef STB_IMAGE_IMPLEMENTATION + +#if defined(STBI_ONLY_JPEG) || defined(STBI_ONLY_PNG) || defined(STBI_ONLY_BMP) \ + || defined(STBI_ONLY_TGA) || defined(STBI_ONLY_GIF) || defined(STBI_ONLY_PSD) \ + || defined(STBI_ONLY_HDR) || defined(STBI_ONLY_PIC) || defined(STBI_ONLY_PNM) \ + || defined(STBI_ONLY_ZLIB) + #ifndef STBI_ONLY_JPEG + #define STBI_NO_JPEG + #endif + #ifndef STBI_ONLY_PNG + #define STBI_NO_PNG + #endif + #ifndef STBI_ONLY_BMP + #define STBI_NO_BMP + #endif + #ifndef STBI_ONLY_PSD + #define STBI_NO_PSD + #endif + #ifndef STBI_ONLY_TGA + #define STBI_NO_TGA + #endif + #ifndef STBI_ONLY_GIF + #define STBI_NO_GIF + #endif + #ifndef STBI_ONLY_HDR + #define STBI_NO_HDR + #endif + #ifndef STBI_ONLY_PIC + #define STBI_NO_PIC + #endif + #ifndef STBI_ONLY_PNM + #define STBI_NO_PNM + #endif +#endif + +#if defined(STBI_NO_PNG) && !defined(STBI_SUPPORT_ZLIB) && !defined(STBI_NO_ZLIB) +#define STBI_NO_ZLIB +#endif + + +#include +#include // ptrdiff_t on osx +#include +#include +#include + +#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR) +#include // ldexp, pow +#endif + +#ifndef STBI_NO_STDIO +#include +#endif + +#ifndef STBI_ASSERT +#include +#define STBI_ASSERT(x) assert(x) +#endif + +#ifdef __cplusplus +#define STBI_EXTERN extern "C" +#else +#define STBI_EXTERN extern +#endif + + +#ifndef _MSC_VER + #ifdef __cplusplus + #define stbi_inline inline + #else + #define stbi_inline + #endif +#else + #define stbi_inline __forceinline +#endif + + +#ifdef _MSC_VER +typedef unsigned short stbi__uint16; +typedef signed short stbi__int16; +typedef unsigned int stbi__uint32; +typedef signed int stbi__int32; +#else +#include +typedef uint16_t stbi__uint16; +typedef int16_t stbi__int16; +typedef uint32_t stbi__uint32; +typedef int32_t stbi__int32; +#endif + +// should produce compiler error if size is wrong +typedef unsigned char validate_uint32[sizeof(stbi__uint32)==4 ? 1 : -1]; + +#ifdef _MSC_VER +#define STBI_NOTUSED(v) (void)(v) +#else +#define STBI_NOTUSED(v) (void)sizeof(v) +#endif + +#ifdef _MSC_VER +#define STBI_HAS_LROTL +#endif + +#ifdef STBI_HAS_LROTL + #define stbi_lrot(x,y) _lrotl(x,y) +#else + #define stbi_lrot(x,y) (((x) << (y)) | ((x) >> (32 - (y)))) +#endif + +#if defined(STBI_MALLOC) && defined(STBI_FREE) && (defined(STBI_REALLOC) || defined(STBI_REALLOC_SIZED)) +// ok +#elif !defined(STBI_MALLOC) && !defined(STBI_FREE) && !defined(STBI_REALLOC) && !defined(STBI_REALLOC_SIZED) +// ok +#else +#error "Must define all or none of STBI_MALLOC, STBI_FREE, and STBI_REALLOC (or STBI_REALLOC_SIZED)." +#endif + +#ifndef STBI_MALLOC +#define STBI_MALLOC(sz) malloc(sz) +#define STBI_REALLOC(p,newsz) realloc(p,newsz) +#define STBI_FREE(p) free(p) +#endif + +#ifndef STBI_REALLOC_SIZED +#define STBI_REALLOC_SIZED(p,oldsz,newsz) STBI_REALLOC(p,newsz) +#endif + +// x86/x64 detection +#if defined(__x86_64__) || defined(_M_X64) +#define STBI__X64_TARGET +#elif defined(__i386) || defined(_M_IX86) +#define STBI__X86_TARGET +#endif + +#if defined(__GNUC__) && defined(STBI__X86_TARGET) && !defined(__SSE2__) && !defined(STBI_NO_SIMD) +// gcc doesn't support sse2 intrinsics unless you compile with -msse2, +// which in turn means it gets to use SSE2 everywhere. This is unfortunate, +// but previous attempts to provide the SSE2 functions with runtime +// detection caused numerous issues. The way architecture extensions are +// exposed in GCC/Clang is, sadly, not really suited for one-file libs. +// New behavior: if compiled with -msse2, we use SSE2 without any +// detection; if not, we don't use it at all. +#define STBI_NO_SIMD +#endif + +#if defined(__MINGW32__) && defined(STBI__X86_TARGET) && !defined(STBI_MINGW_ENABLE_SSE2) && !defined(STBI_NO_SIMD) +// Note that __MINGW32__ doesn't actually mean 32-bit, so we have to avoid STBI__X64_TARGET +// +// 32-bit MinGW wants ESP to be 16-byte aligned, but this is not in the +// Windows ABI and VC++ as well as Windows DLLs don't maintain that invariant. +// As a result, enabling SSE2 on 32-bit MinGW is dangerous when not +// simultaneously enabling "-mstackrealign". +// +// See https://github.com/nothings/stb/issues/81 for more information. +// +// So default to no SSE2 on 32-bit MinGW. If you've read this far and added +// -mstackrealign to your build settings, feel free to #define STBI_MINGW_ENABLE_SSE2. +#define STBI_NO_SIMD +#endif + +#if !defined(STBI_NO_SIMD) && (defined(STBI__X86_TARGET) || defined(STBI__X64_TARGET)) +#define STBI_SSE2 +#include + +#ifdef _MSC_VER + +#if _MSC_VER >= 1400 // not VC6 +#include // __cpuid +static int stbi__cpuid3(void) +{ + int info[4]; + __cpuid(info,1); + return info[3]; +} +#else +static int stbi__cpuid3(void) +{ + int res; + __asm { + mov eax,1 + cpuid + mov res,edx + } + return res; +} +#endif + +#define STBI_SIMD_ALIGN(type, name) __declspec(align(16)) type name + +#if !defined(STBI_NO_JPEG) && defined(STBI_SSE2) +static int stbi__sse2_available(void) +{ + int info3 = stbi__cpuid3(); + return ((info3 >> 26) & 1) != 0; +} +#endif + +#else // assume GCC-style if not VC++ +#define STBI_SIMD_ALIGN(type, name) type name __attribute__((aligned(16))) + +#if !defined(STBI_NO_JPEG) && defined(STBI_SSE2) +static int stbi__sse2_available(void) +{ + // If we're even attempting to compile this on GCC/Clang, that means + // -msse2 is on, which means the compiler is allowed to use SSE2 + // instructions at will, and so are we. + return 1; +} +#endif + +#endif +#endif + +// ARM NEON +#if defined(STBI_NO_SIMD) && defined(STBI_NEON) +#undef STBI_NEON +#endif + +#ifdef STBI_NEON +#include +// assume GCC or Clang on ARM targets +#define STBI_SIMD_ALIGN(type, name) type name __attribute__((aligned(16))) +#endif + +#ifndef STBI_SIMD_ALIGN +#define STBI_SIMD_ALIGN(type, name) type name +#endif + +/////////////////////////////////////////////// +// +// stbi__context struct and start_xxx functions + +// stbi__context structure is our basic context used by all images, so it +// contains all the IO context, plus some basic image information +typedef struct +{ + stbi__uint32 img_x, img_y; + int img_n, img_out_n; + + stbi_io_callbacks io; + void *io_user_data; + + int read_from_callbacks; + int buflen; + stbi_uc buffer_start[128]; + + stbi_uc *img_buffer, *img_buffer_end; + stbi_uc *img_buffer_original, *img_buffer_original_end; +} stbi__context; + + +static void stbi__refill_buffer(stbi__context *s); + +// initialize a memory-decode context +static void stbi__start_mem(stbi__context *s, stbi_uc const *buffer, int len) +{ + s->io.read = NULL; + s->read_from_callbacks = 0; + s->img_buffer = s->img_buffer_original = (stbi_uc *) buffer; + s->img_buffer_end = s->img_buffer_original_end = (stbi_uc *) buffer+len; +} + +// initialize a callback-based context +static void stbi__start_callbacks(stbi__context *s, stbi_io_callbacks *c, void *user) +{ + s->io = *c; + s->io_user_data = user; + s->buflen = sizeof(s->buffer_start); + s->read_from_callbacks = 1; + s->img_buffer_original = s->buffer_start; + stbi__refill_buffer(s); + s->img_buffer_original_end = s->img_buffer_end; +} + +#ifndef STBI_NO_STDIO + +static int stbi__stdio_read(void *user, char *data, int size) +{ + return (int) fread(data,1,size,(FILE*) user); +} + +static void stbi__stdio_skip(void *user, int n) +{ + fseek((FILE*) user, n, SEEK_CUR); +} + +static int stbi__stdio_eof(void *user) +{ + return feof((FILE*) user); +} + +static stbi_io_callbacks stbi__stdio_callbacks = +{ + stbi__stdio_read, + stbi__stdio_skip, + stbi__stdio_eof, +}; + +static void stbi__start_file(stbi__context *s, FILE *f) +{ + stbi__start_callbacks(s, &stbi__stdio_callbacks, (void *) f); +} + +//static void stop_file(stbi__context *s) { } + +#endif // !STBI_NO_STDIO + +static void stbi__rewind(stbi__context *s) +{ + // conceptually rewind SHOULD rewind to the beginning of the stream, + // but we just rewind to the beginning of the initial buffer, because + // we only use it after doing 'test', which only ever looks at at most 92 bytes + s->img_buffer = s->img_buffer_original; + s->img_buffer_end = s->img_buffer_original_end; +} + +enum +{ + STBI_ORDER_RGB, + STBI_ORDER_BGR +}; + +typedef struct +{ + int bits_per_channel; + int num_channels; + int channel_order; +} stbi__result_info; + +#ifndef STBI_NO_JPEG +static int stbi__jpeg_test(stbi__context *s); +static void *stbi__jpeg_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri); +static int stbi__jpeg_info(stbi__context *s, int *x, int *y, int *comp); +#endif + +#ifndef STBI_NO_PNG +static int stbi__png_test(stbi__context *s); +static void *stbi__png_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri); +static int stbi__png_info(stbi__context *s, int *x, int *y, int *comp); +static int stbi__png_is16(stbi__context *s); +#endif + +#ifndef STBI_NO_BMP +static int stbi__bmp_test(stbi__context *s); +static void *stbi__bmp_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri); +static int stbi__bmp_info(stbi__context *s, int *x, int *y, int *comp); +#endif + +#ifndef STBI_NO_TGA +static int stbi__tga_test(stbi__context *s); +static void *stbi__tga_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri); +static int stbi__tga_info(stbi__context *s, int *x, int *y, int *comp); +#endif + +#ifndef STBI_NO_PSD +static int stbi__psd_test(stbi__context *s); +static void *stbi__psd_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri, int bpc); +static int stbi__psd_info(stbi__context *s, int *x, int *y, int *comp); +static int stbi__psd_is16(stbi__context *s); +#endif + +#ifndef STBI_NO_HDR +static int stbi__hdr_test(stbi__context *s); +static float *stbi__hdr_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri); +static int stbi__hdr_info(stbi__context *s, int *x, int *y, int *comp); +#endif + +#ifndef STBI_NO_PIC +static int stbi__pic_test(stbi__context *s); +static void *stbi__pic_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri); +static int stbi__pic_info(stbi__context *s, int *x, int *y, int *comp); +#endif + +#ifndef STBI_NO_GIF +static int stbi__gif_test(stbi__context *s); +static void *stbi__gif_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri); +static void *stbi__load_gif_main(stbi__context *s, int **delays, int *x, int *y, int *z, int *comp, int req_comp); +static int stbi__gif_info(stbi__context *s, int *x, int *y, int *comp); +#endif + +#ifndef STBI_NO_PNM +static int stbi__pnm_test(stbi__context *s); +static void *stbi__pnm_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri); +static int stbi__pnm_info(stbi__context *s, int *x, int *y, int *comp); +#endif + +// this is not threadsafe +static const char *stbi__g_failure_reason; + +STBIDEF const char *stbi_failure_reason(void) +{ + return stbi__g_failure_reason; +} + +static int stbi__err(const char *str) +{ + stbi__g_failure_reason = str; + return 0; +} + +static void *stbi__malloc(size_t size) +{ + return STBI_MALLOC(size); +} + +// stb_image uses ints pervasively, including for offset calculations. +// therefore the largest decoded image size we can support with the +// current code, even on 64-bit targets, is INT_MAX. this is not a +// significant limitation for the intended use case. +// +// we do, however, need to make sure our size calculations don't +// overflow. hence a few helper functions for size calculations that +// multiply integers together, making sure that they're non-negative +// and no overflow occurs. + +// return 1 if the sum is valid, 0 on overflow. +// negative terms are considered invalid. +static int stbi__addsizes_valid(int a, int b) +{ + if (b < 0) return 0; + // now 0 <= b <= INT_MAX, hence also + // 0 <= INT_MAX - b <= INTMAX. + // And "a + b <= INT_MAX" (which might overflow) is the + // same as a <= INT_MAX - b (no overflow) + return a <= INT_MAX - b; +} + +// returns 1 if the product is valid, 0 on overflow. +// negative factors are considered invalid. +static int stbi__mul2sizes_valid(int a, int b) +{ + if (a < 0 || b < 0) return 0; + if (b == 0) return 1; // mul-by-0 is always safe + // portable way to check for no overflows in a*b + return a <= INT_MAX/b; +} + +// returns 1 if "a*b + add" has no negative terms/factors and doesn't overflow +static int stbi__mad2sizes_valid(int a, int b, int add) +{ + return stbi__mul2sizes_valid(a, b) && stbi__addsizes_valid(a*b, add); +} + +// returns 1 if "a*b*c + add" has no negative terms/factors and doesn't overflow +static int stbi__mad3sizes_valid(int a, int b, int c, int add) +{ + return stbi__mul2sizes_valid(a, b) && stbi__mul2sizes_valid(a*b, c) && + stbi__addsizes_valid(a*b*c, add); +} + +// returns 1 if "a*b*c*d + add" has no negative terms/factors and doesn't overflow +#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR) +static int stbi__mad4sizes_valid(int a, int b, int c, int d, int add) +{ + return stbi__mul2sizes_valid(a, b) && stbi__mul2sizes_valid(a*b, c) && + stbi__mul2sizes_valid(a*b*c, d) && stbi__addsizes_valid(a*b*c*d, add); +} +#endif + +// mallocs with size overflow checking +static void *stbi__malloc_mad2(int a, int b, int add) +{ + if (!stbi__mad2sizes_valid(a, b, add)) return NULL; + return stbi__malloc(a*b + add); +} + +static void *stbi__malloc_mad3(int a, int b, int c, int add) +{ + if (!stbi__mad3sizes_valid(a, b, c, add)) return NULL; + return stbi__malloc(a*b*c + add); +} + +#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR) +static void *stbi__malloc_mad4(int a, int b, int c, int d, int add) +{ + if (!stbi__mad4sizes_valid(a, b, c, d, add)) return NULL; + return stbi__malloc(a*b*c*d + add); +} +#endif + +// stbi__err - error +// stbi__errpf - error returning pointer to float +// stbi__errpuc - error returning pointer to unsigned char + +#ifdef STBI_NO_FAILURE_STRINGS + #define stbi__err(x,y) 0 +#elif defined(STBI_FAILURE_USERMSG) + #define stbi__err(x,y) stbi__err(y) +#else + #define stbi__err(x,y) stbi__err(x) +#endif + +#define stbi__errpf(x,y) ((float *)(size_t) (stbi__err(x,y)?NULL:NULL)) +#define stbi__errpuc(x,y) ((unsigned char *)(size_t) (stbi__err(x,y)?NULL:NULL)) + +STBIDEF void stbi_image_free(void *retval_from_stbi_load) +{ + STBI_FREE(retval_from_stbi_load); +} + +#ifndef STBI_NO_LINEAR +static float *stbi__ldr_to_hdr(stbi_uc *data, int x, int y, int comp); +#endif + +#ifndef STBI_NO_HDR +static stbi_uc *stbi__hdr_to_ldr(float *data, int x, int y, int comp); +#endif + +static int stbi__vertically_flip_on_load = 0; + +STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip) +{ + stbi__vertically_flip_on_load = flag_true_if_should_flip; +} + +static void *stbi__load_main(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri, int bpc) +{ + memset(ri, 0, sizeof(*ri)); // make sure it's initialized if we add new fields + ri->bits_per_channel = 8; // default is 8 so most paths don't have to be changed + ri->channel_order = STBI_ORDER_RGB; // all current input & output are this, but this is here so we can add BGR order + ri->num_channels = 0; + + #ifndef STBI_NO_JPEG + if (stbi__jpeg_test(s)) return stbi__jpeg_load(s,x,y,comp,req_comp, ri); + #endif + #ifndef STBI_NO_PNG + if (stbi__png_test(s)) return stbi__png_load(s,x,y,comp,req_comp, ri); + #endif + #ifndef STBI_NO_BMP + if (stbi__bmp_test(s)) return stbi__bmp_load(s,x,y,comp,req_comp, ri); + #endif + #ifndef STBI_NO_GIF + if (stbi__gif_test(s)) return stbi__gif_load(s,x,y,comp,req_comp, ri); + #endif + #ifndef STBI_NO_PSD + if (stbi__psd_test(s)) return stbi__psd_load(s,x,y,comp,req_comp, ri, bpc); + #endif + #ifndef STBI_NO_PIC + if (stbi__pic_test(s)) return stbi__pic_load(s,x,y,comp,req_comp, ri); + #endif + #ifndef STBI_NO_PNM + if (stbi__pnm_test(s)) return stbi__pnm_load(s,x,y,comp,req_comp, ri); + #endif + + #ifndef STBI_NO_HDR + if (stbi__hdr_test(s)) { + float *hdr = stbi__hdr_load(s, x,y,comp,req_comp, ri); + return stbi__hdr_to_ldr(hdr, *x, *y, req_comp ? req_comp : *comp); + } + #endif + + #ifndef STBI_NO_TGA + // test tga last because it's a crappy test! + if (stbi__tga_test(s)) + return stbi__tga_load(s,x,y,comp,req_comp, ri); + #endif + + return stbi__errpuc("unknown image type", "Image not of any known type, or corrupt"); +} + +static stbi_uc *stbi__convert_16_to_8(stbi__uint16 *orig, int w, int h, int channels) +{ + int i; + int img_len = w * h * channels; + stbi_uc *reduced; + + reduced = (stbi_uc *) stbi__malloc(img_len); + if (reduced == NULL) return stbi__errpuc("outofmem", "Out of memory"); + + for (i = 0; i < img_len; ++i) + reduced[i] = (stbi_uc)((orig[i] >> 8) & 0xFF); // top half of each byte is sufficient approx of 16->8 bit scaling + + STBI_FREE(orig); + return reduced; +} + +static stbi__uint16 *stbi__convert_8_to_16(stbi_uc *orig, int w, int h, int channels) +{ + int i; + int img_len = w * h * channels; + stbi__uint16 *enlarged; + + enlarged = (stbi__uint16 *) stbi__malloc(img_len*2); + if (enlarged == NULL) return (stbi__uint16 *) stbi__errpuc("outofmem", "Out of memory"); + + for (i = 0; i < img_len; ++i) + enlarged[i] = (stbi__uint16)((orig[i] << 8) + orig[i]); // replicate to high and low byte, maps 0->0, 255->0xffff + + STBI_FREE(orig); + return enlarged; +} + +static void stbi__vertical_flip(void *image, int w, int h, int bytes_per_pixel) +{ + int row; + size_t bytes_per_row = (size_t)w * bytes_per_pixel; + stbi_uc temp[2048]; + stbi_uc *bytes = (stbi_uc *)image; + + for (row = 0; row < (h>>1); row++) { + stbi_uc *row0 = bytes + row*bytes_per_row; + stbi_uc *row1 = bytes + (h - row - 1)*bytes_per_row; + // swap row0 with row1 + size_t bytes_left = bytes_per_row; + while (bytes_left) { + size_t bytes_copy = (bytes_left < sizeof(temp)) ? bytes_left : sizeof(temp); + memcpy(temp, row0, bytes_copy); + memcpy(row0, row1, bytes_copy); + memcpy(row1, temp, bytes_copy); + row0 += bytes_copy; + row1 += bytes_copy; + bytes_left -= bytes_copy; + } + } +} + +#ifndef STBI_NO_GIF +static void stbi__vertical_flip_slices(void *image, int w, int h, int z, int bytes_per_pixel) +{ + int slice; + int slice_size = w * h * bytes_per_pixel; + + stbi_uc *bytes = (stbi_uc *)image; + for (slice = 0; slice < z; ++slice) { + stbi__vertical_flip(bytes, w, h, bytes_per_pixel); + bytes += slice_size; + } +} +#endif + +static unsigned char *stbi__load_and_postprocess_8bit(stbi__context *s, int *x, int *y, int *comp, int req_comp) +{ + stbi__result_info ri; + void *result = stbi__load_main(s, x, y, comp, req_comp, &ri, 8); + + if (result == NULL) + return NULL; + + if (ri.bits_per_channel != 8) { + STBI_ASSERT(ri.bits_per_channel == 16); + result = stbi__convert_16_to_8((stbi__uint16 *) result, *x, *y, req_comp == 0 ? *comp : req_comp); + ri.bits_per_channel = 8; + } + + // @TODO: move stbi__convert_format to here + + if (stbi__vertically_flip_on_load) { + int channels = req_comp ? req_comp : *comp; + stbi__vertical_flip(result, *x, *y, channels * sizeof(stbi_uc)); + } + + return (unsigned char *) result; +} + +static stbi__uint16 *stbi__load_and_postprocess_16bit(stbi__context *s, int *x, int *y, int *comp, int req_comp) +{ + stbi__result_info ri; + void *result = stbi__load_main(s, x, y, comp, req_comp, &ri, 16); + + if (result == NULL) + return NULL; + + if (ri.bits_per_channel != 16) { + STBI_ASSERT(ri.bits_per_channel == 8); + result = stbi__convert_8_to_16((stbi_uc *) result, *x, *y, req_comp == 0 ? *comp : req_comp); + ri.bits_per_channel = 16; + } + + // @TODO: move stbi__convert_format16 to here + // @TODO: special case RGB-to-Y (and RGBA-to-YA) for 8-bit-to-16-bit case to keep more precision + + if (stbi__vertically_flip_on_load) { + int channels = req_comp ? req_comp : *comp; + stbi__vertical_flip(result, *x, *y, channels * sizeof(stbi__uint16)); + } + + return (stbi__uint16 *) result; +} + +#if !defined(STBI_NO_HDR) && !defined(STBI_NO_LINEAR) +static void stbi__float_postprocess(float *result, int *x, int *y, int *comp, int req_comp) +{ + if (stbi__vertically_flip_on_load && result != NULL) { + int channels = req_comp ? req_comp : *comp; + stbi__vertical_flip(result, *x, *y, channels * sizeof(float)); + } +} +#endif + +#ifndef STBI_NO_STDIO + +#if defined(_MSC_VER) && defined(STBI_WINDOWS_UTF8) +STBI_EXTERN __declspec(dllimport) int __stdcall MultiByteToWideChar(unsigned int cp, unsigned long flags, const char *str, int cbmb, wchar_t *widestr, int cchwide); +STBI_EXTERN __declspec(dllimport) int __stdcall WideCharToMultiByte(unsigned int cp, unsigned long flags, const wchar_t *widestr, int cchwide, char *str, int cbmb, const char *defchar, int *used_default); +#endif + +#if defined(_MSC_VER) && defined(STBI_WINDOWS_UTF8) +STBIDEF int stbi_convert_wchar_to_utf8(char *buffer, size_t bufferlen, const wchar_t* input) +{ + return WideCharToMultiByte(65001 /* UTF8 */, 0, input, -1, buffer, bufferlen, NULL, NULL); +} +#endif + +static FILE *stbi__fopen(char const *filename, char const *mode) +{ + FILE *f; +#if defined(_MSC_VER) && defined(STBI_WINDOWS_UTF8) + wchar_t wMode[64]; + wchar_t wFilename[1024]; + if (0 == MultiByteToWideChar(65001 /* UTF8 */, 0, filename, -1, wFilename, sizeof(wFilename))) + return 0; + + if (0 == MultiByteToWideChar(65001 /* UTF8 */, 0, mode, -1, wMode, sizeof(wMode))) + return 0; + +#if _MSC_VER >= 1400 + if (0 != _wfopen_s(&f, wFilename, wMode)) + f = 0; +#else + f = _wfopen(wFilename, wMode); +#endif + +#elif defined(_MSC_VER) && _MSC_VER >= 1400 + if (0 != fopen_s(&f, filename, mode)) + f=0; +#else + f = fopen(filename, mode); +#endif + return f; +} + + +STBIDEF stbi_uc *stbi_load(char const *filename, int *x, int *y, int *comp, int req_comp) +{ + FILE *f = stbi__fopen(filename, "rb"); + unsigned char *result; + if (!f) return stbi__errpuc("can't fopen", "Unable to open file"); + result = stbi_load_from_file(f,x,y,comp,req_comp); + fclose(f); + return result; +} + +STBIDEF stbi_uc *stbi_load_from_file(FILE *f, int *x, int *y, int *comp, int req_comp) +{ + unsigned char *result; + stbi__context s; + stbi__start_file(&s,f); + result = stbi__load_and_postprocess_8bit(&s,x,y,comp,req_comp); + if (result) { + // need to 'unget' all the characters in the IO buffer + fseek(f, - (int) (s.img_buffer_end - s.img_buffer), SEEK_CUR); + } + return result; +} + +STBIDEF stbi__uint16 *stbi_load_from_file_16(FILE *f, int *x, int *y, int *comp, int req_comp) +{ + stbi__uint16 *result; + stbi__context s; + stbi__start_file(&s,f); + result = stbi__load_and_postprocess_16bit(&s,x,y,comp,req_comp); + if (result) { + // need to 'unget' all the characters in the IO buffer + fseek(f, - (int) (s.img_buffer_end - s.img_buffer), SEEK_CUR); + } + return result; +} + +STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp) +{ + FILE *f = stbi__fopen(filename, "rb"); + stbi__uint16 *result; + if (!f) return (stbi_us *) stbi__errpuc("can't fopen", "Unable to open file"); + result = stbi_load_from_file_16(f,x,y,comp,req_comp); + fclose(f); + return result; +} + + +#endif //!STBI_NO_STDIO + +STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels) +{ + stbi__context s; + stbi__start_mem(&s,buffer,len); + return stbi__load_and_postprocess_16bit(&s,x,y,channels_in_file,desired_channels); +} + +STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels) +{ + stbi__context s; + stbi__start_callbacks(&s, (stbi_io_callbacks *)clbk, user); + return stbi__load_and_postprocess_16bit(&s,x,y,channels_in_file,desired_channels); +} + +STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp) +{ + stbi__context s; + stbi__start_mem(&s,buffer,len); + return stbi__load_and_postprocess_8bit(&s,x,y,comp,req_comp); +} + +STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp) +{ + stbi__context s; + stbi__start_callbacks(&s, (stbi_io_callbacks *) clbk, user); + return stbi__load_and_postprocess_8bit(&s,x,y,comp,req_comp); +} + +#ifndef STBI_NO_GIF +STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp) +{ + unsigned char *result; + stbi__context s; + stbi__start_mem(&s,buffer,len); + + result = (unsigned char*) stbi__load_gif_main(&s, delays, x, y, z, comp, req_comp); + if (stbi__vertically_flip_on_load) { + stbi__vertical_flip_slices( result, *x, *y, *z, *comp ); + } + + return result; +} +#endif + +#ifndef STBI_NO_LINEAR +static float *stbi__loadf_main(stbi__context *s, int *x, int *y, int *comp, int req_comp) +{ + unsigned char *data; + #ifndef STBI_NO_HDR + if (stbi__hdr_test(s)) { + stbi__result_info ri; + float *hdr_data = stbi__hdr_load(s,x,y,comp,req_comp, &ri); + if (hdr_data) + stbi__float_postprocess(hdr_data,x,y,comp,req_comp); + return hdr_data; + } + #endif + data = stbi__load_and_postprocess_8bit(s, x, y, comp, req_comp); + if (data) + return stbi__ldr_to_hdr(data, *x, *y, req_comp ? req_comp : *comp); + return stbi__errpf("unknown image type", "Image not of any known type, or corrupt"); +} + +STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp) +{ + stbi__context s; + stbi__start_mem(&s,buffer,len); + return stbi__loadf_main(&s,x,y,comp,req_comp); +} + +STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp) +{ + stbi__context s; + stbi__start_callbacks(&s, (stbi_io_callbacks *) clbk, user); + return stbi__loadf_main(&s,x,y,comp,req_comp); +} + +#ifndef STBI_NO_STDIO +STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp) +{ + float *result; + FILE *f = stbi__fopen(filename, "rb"); + if (!f) return stbi__errpf("can't fopen", "Unable to open file"); + result = stbi_loadf_from_file(f,x,y,comp,req_comp); + fclose(f); + return result; +} + +STBIDEF float *stbi_loadf_from_file(FILE *f, int *x, int *y, int *comp, int req_comp) +{ + stbi__context s; + stbi__start_file(&s,f); + return stbi__loadf_main(&s,x,y,comp,req_comp); +} +#endif // !STBI_NO_STDIO + +#endif // !STBI_NO_LINEAR + +// these is-hdr-or-not is defined independent of whether STBI_NO_LINEAR is +// defined, for API simplicity; if STBI_NO_LINEAR is defined, it always +// reports false! + +STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len) +{ + #ifndef STBI_NO_HDR + stbi__context s; + stbi__start_mem(&s,buffer,len); + return stbi__hdr_test(&s); + #else + STBI_NOTUSED(buffer); + STBI_NOTUSED(len); + return 0; + #endif +} + +#ifndef STBI_NO_STDIO +STBIDEF int stbi_is_hdr (char const *filename) +{ + FILE *f = stbi__fopen(filename, "rb"); + int result=0; + if (f) { + result = stbi_is_hdr_from_file(f); + fclose(f); + } + return result; +} + +STBIDEF int stbi_is_hdr_from_file(FILE *f) +{ + #ifndef STBI_NO_HDR + long pos = ftell(f); + int res; + stbi__context s; + stbi__start_file(&s,f); + res = stbi__hdr_test(&s); + fseek(f, pos, SEEK_SET); + return res; + #else + STBI_NOTUSED(f); + return 0; + #endif +} +#endif // !STBI_NO_STDIO + +STBIDEF int stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user) +{ + #ifndef STBI_NO_HDR + stbi__context s; + stbi__start_callbacks(&s, (stbi_io_callbacks *) clbk, user); + return stbi__hdr_test(&s); + #else + STBI_NOTUSED(clbk); + STBI_NOTUSED(user); + return 0; + #endif +} + +#ifndef STBI_NO_LINEAR +static float stbi__l2h_gamma=2.2f, stbi__l2h_scale=1.0f; + +STBIDEF void stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; } +STBIDEF void stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; } +#endif + +static float stbi__h2l_gamma_i=1.0f/2.2f, stbi__h2l_scale_i=1.0f; + +STBIDEF void stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; } +STBIDEF void stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; } + + +////////////////////////////////////////////////////////////////////////////// +// +// Common code used by all image loaders +// + +enum +{ + STBI__SCAN_load=0, + STBI__SCAN_type, + STBI__SCAN_header +}; + +static void stbi__refill_buffer(stbi__context *s) +{ + int n = (s->io.read)(s->io_user_data,(char*)s->buffer_start,s->buflen); + if (n == 0) { + // at end of file, treat same as if from memory, but need to handle case + // where s->img_buffer isn't pointing to safe memory, e.g. 0-byte file + s->read_from_callbacks = 0; + s->img_buffer = s->buffer_start; + s->img_buffer_end = s->buffer_start+1; + *s->img_buffer = 0; + } else { + s->img_buffer = s->buffer_start; + s->img_buffer_end = s->buffer_start + n; + } +} + +stbi_inline static stbi_uc stbi__get8(stbi__context *s) +{ + if (s->img_buffer < s->img_buffer_end) + return *s->img_buffer++; + if (s->read_from_callbacks) { + stbi__refill_buffer(s); + return *s->img_buffer++; + } + return 0; +} + +stbi_inline static int stbi__at_eof(stbi__context *s) +{ + if (s->io.read) { + if (!(s->io.eof)(s->io_user_data)) return 0; + // if feof() is true, check if buffer = end + // special case: we've only got the special 0 character at the end + if (s->read_from_callbacks == 0) return 1; + } + + return s->img_buffer >= s->img_buffer_end; +} + +static void stbi__skip(stbi__context *s, int n) +{ + if (n < 0) { + s->img_buffer = s->img_buffer_end; + return; + } + if (s->io.read) { + int blen = (int) (s->img_buffer_end - s->img_buffer); + if (blen < n) { + s->img_buffer = s->img_buffer_end; + (s->io.skip)(s->io_user_data, n - blen); + return; + } + } + s->img_buffer += n; +} + +static int stbi__getn(stbi__context *s, stbi_uc *buffer, int n) +{ + if (s->io.read) { + int blen = (int) (s->img_buffer_end - s->img_buffer); + if (blen < n) { + int res, count; + + memcpy(buffer, s->img_buffer, blen); + + count = (s->io.read)(s->io_user_data, (char*) buffer + blen, n - blen); + res = (count == (n-blen)); + s->img_buffer = s->img_buffer_end; + return res; + } + } + + if (s->img_buffer+n <= s->img_buffer_end) { + memcpy(buffer, s->img_buffer, n); + s->img_buffer += n; + return 1; + } else + return 0; +} + +static int stbi__get16be(stbi__context *s) +{ + int z = stbi__get8(s); + return (z << 8) + stbi__get8(s); +} + +static stbi__uint32 stbi__get32be(stbi__context *s) +{ + stbi__uint32 z = stbi__get16be(s); + return (z << 16) + stbi__get16be(s); +} + +#if defined(STBI_NO_BMP) && defined(STBI_NO_TGA) && defined(STBI_NO_GIF) +// nothing +#else +static int stbi__get16le(stbi__context *s) +{ + int z = stbi__get8(s); + return z + (stbi__get8(s) << 8); +} +#endif + +#ifndef STBI_NO_BMP +static stbi__uint32 stbi__get32le(stbi__context *s) +{ + stbi__uint32 z = stbi__get16le(s); + return z + (stbi__get16le(s) << 16); +} +#endif + +#define STBI__BYTECAST(x) ((stbi_uc) ((x) & 255)) // truncate int to byte without warnings + + +////////////////////////////////////////////////////////////////////////////// +// +// generic converter from built-in img_n to req_comp +// individual types do this automatically as much as possible (e.g. jpeg +// does all cases internally since it needs to colorspace convert anyway, +// and it never has alpha, so very few cases ). png can automatically +// interleave an alpha=255 channel, but falls back to this for other cases +// +// assume data buffer is malloced, so malloc a new one and free that one +// only failure mode is malloc failing + +static stbi_uc stbi__compute_y(int r, int g, int b) +{ + return (stbi_uc) (((r*77) + (g*150) + (29*b)) >> 8); +} + +static unsigned char *stbi__convert_format(unsigned char *data, int img_n, int req_comp, unsigned int x, unsigned int y) +{ + int i,j; + unsigned char *good; + + if (req_comp == img_n) return data; + STBI_ASSERT(req_comp >= 1 && req_comp <= 4); + + good = (unsigned char *) stbi__malloc_mad3(req_comp, x, y, 0); + if (good == NULL) { + STBI_FREE(data); + return stbi__errpuc("outofmem", "Out of memory"); + } + + for (j=0; j < (int) y; ++j) { + unsigned char *src = data + j * x * img_n ; + unsigned char *dest = good + j * x * req_comp; + + #define STBI__COMBO(a,b) ((a)*8+(b)) + #define STBI__CASE(a,b) case STBI__COMBO(a,b): for(i=x-1; i >= 0; --i, src += a, dest += b) + // convert source image with img_n components to one with req_comp components; + // avoid switch per pixel, so use switch per scanline and massive macros + switch (STBI__COMBO(img_n, req_comp)) { + STBI__CASE(1,2) { dest[0]=src[0]; dest[1]=255; } break; + STBI__CASE(1,3) { dest[0]=dest[1]=dest[2]=src[0]; } break; + STBI__CASE(1,4) { dest[0]=dest[1]=dest[2]=src[0]; dest[3]=255; } break; + STBI__CASE(2,1) { dest[0]=src[0]; } break; + STBI__CASE(2,3) { dest[0]=dest[1]=dest[2]=src[0]; } break; + STBI__CASE(2,4) { dest[0]=dest[1]=dest[2]=src[0]; dest[3]=src[1]; } break; + STBI__CASE(3,4) { dest[0]=src[0];dest[1]=src[1];dest[2]=src[2];dest[3]=255; } break; + STBI__CASE(3,1) { dest[0]=stbi__compute_y(src[0],src[1],src[2]); } break; + STBI__CASE(3,2) { dest[0]=stbi__compute_y(src[0],src[1],src[2]); dest[1] = 255; } break; + STBI__CASE(4,1) { dest[0]=stbi__compute_y(src[0],src[1],src[2]); } break; + STBI__CASE(4,2) { dest[0]=stbi__compute_y(src[0],src[1],src[2]); dest[1] = src[3]; } break; + STBI__CASE(4,3) { dest[0]=src[0];dest[1]=src[1];dest[2]=src[2]; } break; + default: STBI_ASSERT(0); + } + #undef STBI__CASE + } + + STBI_FREE(data); + return good; +} + +static stbi__uint16 stbi__compute_y_16(int r, int g, int b) +{ + return (stbi__uint16) (((r*77) + (g*150) + (29*b)) >> 8); +} + +static stbi__uint16 *stbi__convert_format16(stbi__uint16 *data, int img_n, int req_comp, unsigned int x, unsigned int y) +{ + int i,j; + stbi__uint16 *good; + + if (req_comp == img_n) return data; + STBI_ASSERT(req_comp >= 1 && req_comp <= 4); + + good = (stbi__uint16 *) stbi__malloc(req_comp * x * y * 2); + if (good == NULL) { + STBI_FREE(data); + return (stbi__uint16 *) stbi__errpuc("outofmem", "Out of memory"); + } + + for (j=0; j < (int) y; ++j) { + stbi__uint16 *src = data + j * x * img_n ; + stbi__uint16 *dest = good + j * x * req_comp; + + #define STBI__COMBO(a,b) ((a)*8+(b)) + #define STBI__CASE(a,b) case STBI__COMBO(a,b): for(i=x-1; i >= 0; --i, src += a, dest += b) + // convert source image with img_n components to one with req_comp components; + // avoid switch per pixel, so use switch per scanline and massive macros + switch (STBI__COMBO(img_n, req_comp)) { + STBI__CASE(1,2) { dest[0]=src[0]; dest[1]=0xffff; } break; + STBI__CASE(1,3) { dest[0]=dest[1]=dest[2]=src[0]; } break; + STBI__CASE(1,4) { dest[0]=dest[1]=dest[2]=src[0]; dest[3]=0xffff; } break; + STBI__CASE(2,1) { dest[0]=src[0]; } break; + STBI__CASE(2,3) { dest[0]=dest[1]=dest[2]=src[0]; } break; + STBI__CASE(2,4) { dest[0]=dest[1]=dest[2]=src[0]; dest[3]=src[1]; } break; + STBI__CASE(3,4) { dest[0]=src[0];dest[1]=src[1];dest[2]=src[2];dest[3]=0xffff; } break; + STBI__CASE(3,1) { dest[0]=stbi__compute_y_16(src[0],src[1],src[2]); } break; + STBI__CASE(3,2) { dest[0]=stbi__compute_y_16(src[0],src[1],src[2]); dest[1] = 0xffff; } break; + STBI__CASE(4,1) { dest[0]=stbi__compute_y_16(src[0],src[1],src[2]); } break; + STBI__CASE(4,2) { dest[0]=stbi__compute_y_16(src[0],src[1],src[2]); dest[1] = src[3]; } break; + STBI__CASE(4,3) { dest[0]=src[0];dest[1]=src[1];dest[2]=src[2]; } break; + default: STBI_ASSERT(0); + } + #undef STBI__CASE + } + + STBI_FREE(data); + return good; +} + +#ifndef STBI_NO_LINEAR +static float *stbi__ldr_to_hdr(stbi_uc *data, int x, int y, int comp) +{ + int i,k,n; + float *output; + if (!data) return NULL; + output = (float *) stbi__malloc_mad4(x, y, comp, sizeof(float), 0); + if (output == NULL) { STBI_FREE(data); return stbi__errpf("outofmem", "Out of memory"); } + // compute number of non-alpha components + if (comp & 1) n = comp; else n = comp-1; + for (i=0; i < x*y; ++i) { + for (k=0; k < n; ++k) { + output[i*comp + k] = (float) (pow(data[i*comp+k]/255.0f, stbi__l2h_gamma) * stbi__l2h_scale); + } + } + if (n < comp) { + for (i=0; i < x*y; ++i) { + output[i*comp + n] = data[i*comp + n]/255.0f; + } + } + STBI_FREE(data); + return output; +} +#endif + +#ifndef STBI_NO_HDR +#define stbi__float2int(x) ((int) (x)) +static stbi_uc *stbi__hdr_to_ldr(float *data, int x, int y, int comp) +{ + int i,k,n; + stbi_uc *output; + if (!data) return NULL; + output = (stbi_uc *) stbi__malloc_mad3(x, y, comp, 0); + if (output == NULL) { STBI_FREE(data); return stbi__errpuc("outofmem", "Out of memory"); } + // compute number of non-alpha components + if (comp & 1) n = comp; else n = comp-1; + for (i=0; i < x*y; ++i) { + for (k=0; k < n; ++k) { + float z = (float) pow(data[i*comp+k]*stbi__h2l_scale_i, stbi__h2l_gamma_i) * 255 + 0.5f; + if (z < 0) z = 0; + if (z > 255) z = 255; + output[i*comp + k] = (stbi_uc) stbi__float2int(z); + } + if (k < comp) { + float z = data[i*comp+k] * 255 + 0.5f; + if (z < 0) z = 0; + if (z > 255) z = 255; + output[i*comp + k] = (stbi_uc) stbi__float2int(z); + } + } + STBI_FREE(data); + return output; +} +#endif + +////////////////////////////////////////////////////////////////////////////// +// +// "baseline" JPEG/JFIF decoder +// +// simple implementation +// - doesn't support delayed output of y-dimension +// - simple interface (only one output format: 8-bit interleaved RGB) +// - doesn't try to recover corrupt jpegs +// - doesn't allow partial loading, loading multiple at once +// - still fast on x86 (copying globals into locals doesn't help x86) +// - allocates lots of intermediate memory (full size of all components) +// - non-interleaved case requires this anyway +// - allows good upsampling (see next) +// high-quality +// - upsampled channels are bilinearly interpolated, even across blocks +// - quality integer IDCT derived from IJG's 'slow' +// performance +// - fast huffman; reasonable integer IDCT +// - some SIMD kernels for common paths on targets with SSE2/NEON +// - uses a lot of intermediate memory, could cache poorly + +#ifndef STBI_NO_JPEG + +// huffman decoding acceleration +#define FAST_BITS 9 // larger handles more cases; smaller stomps less cache + +typedef struct +{ + stbi_uc fast[1 << FAST_BITS]; + // weirdly, repacking this into AoS is a 10% speed loss, instead of a win + stbi__uint16 code[256]; + stbi_uc values[256]; + stbi_uc size[257]; + unsigned int maxcode[18]; + int delta[17]; // old 'firstsymbol' - old 'firstcode' +} stbi__huffman; + +typedef struct +{ + stbi__context *s; + stbi__huffman huff_dc[4]; + stbi__huffman huff_ac[4]; + stbi__uint16 dequant[4][64]; + stbi__int16 fast_ac[4][1 << FAST_BITS]; + +// sizes for components, interleaved MCUs + int img_h_max, img_v_max; + int img_mcu_x, img_mcu_y; + int img_mcu_w, img_mcu_h; + +// definition of jpeg image component + struct + { + int id; + int h,v; + int tq; + int hd,ha; + int dc_pred; + + int x,y,w2,h2; + stbi_uc *data; + void *raw_data, *raw_coeff; + stbi_uc *linebuf; + short *coeff; // progressive only + int coeff_w, coeff_h; // number of 8x8 coefficient blocks + } img_comp[4]; + + stbi__uint32 code_buffer; // jpeg entropy-coded buffer + int code_bits; // number of valid bits + unsigned char marker; // marker seen while filling entropy buffer + int nomore; // flag if we saw a marker so must stop + + int progressive; + int spec_start; + int spec_end; + int succ_high; + int succ_low; + int eob_run; + int jfif; + int app14_color_transform; // Adobe APP14 tag + int rgb; + + int scan_n, order[4]; + int restart_interval, todo; + +// kernels + void (*idct_block_kernel)(stbi_uc *out, int out_stride, short data[64]); + void (*YCbCr_to_RGB_kernel)(stbi_uc *out, const stbi_uc *y, const stbi_uc *pcb, const stbi_uc *pcr, int count, int step); + stbi_uc *(*resample_row_hv_2_kernel)(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs); +} stbi__jpeg; + +static int stbi__build_huffman(stbi__huffman *h, int *count) +{ + int i,j,k=0; + unsigned int code; + // build size list for each symbol (from JPEG spec) + for (i=0; i < 16; ++i) + for (j=0; j < count[i]; ++j) + h->size[k++] = (stbi_uc) (i+1); + h->size[k] = 0; + + // compute actual symbols (from jpeg spec) + code = 0; + k = 0; + for(j=1; j <= 16; ++j) { + // compute delta to add to code to compute symbol id + h->delta[j] = k - code; + if (h->size[k] == j) { + while (h->size[k] == j) + h->code[k++] = (stbi__uint16) (code++); + if (code-1 >= (1u << j)) return stbi__err("bad code lengths","Corrupt JPEG"); + } + // compute largest code + 1 for this size, preshifted as needed later + h->maxcode[j] = code << (16-j); + code <<= 1; + } + h->maxcode[j] = 0xffffffff; + + // build non-spec acceleration table; 255 is flag for not-accelerated + memset(h->fast, 255, 1 << FAST_BITS); + for (i=0; i < k; ++i) { + int s = h->size[i]; + if (s <= FAST_BITS) { + int c = h->code[i] << (FAST_BITS-s); + int m = 1 << (FAST_BITS-s); + for (j=0; j < m; ++j) { + h->fast[c+j] = (stbi_uc) i; + } + } + } + return 1; +} + +// build a table that decodes both magnitude and value of small ACs in +// one go. +static void stbi__build_fast_ac(stbi__int16 *fast_ac, stbi__huffman *h) +{ + int i; + for (i=0; i < (1 << FAST_BITS); ++i) { + stbi_uc fast = h->fast[i]; + fast_ac[i] = 0; + if (fast < 255) { + int rs = h->values[fast]; + int run = (rs >> 4) & 15; + int magbits = rs & 15; + int len = h->size[fast]; + + if (magbits && len + magbits <= FAST_BITS) { + // magnitude code followed by receive_extend code + int k = ((i << len) & ((1 << FAST_BITS) - 1)) >> (FAST_BITS - magbits); + int m = 1 << (magbits - 1); + if (k < m) k += (~0U << magbits) + 1; + // if the result is small enough, we can fit it in fast_ac table + if (k >= -128 && k <= 127) + fast_ac[i] = (stbi__int16) ((k * 256) + (run * 16) + (len + magbits)); + } + } + } +} + +static void stbi__grow_buffer_unsafe(stbi__jpeg *j) +{ + do { + unsigned int b = j->nomore ? 0 : stbi__get8(j->s); + if (b == 0xff) { + int c = stbi__get8(j->s); + while (c == 0xff) c = stbi__get8(j->s); // consume fill bytes + if (c != 0) { + j->marker = (unsigned char) c; + j->nomore = 1; + return; + } + } + j->code_buffer |= b << (24 - j->code_bits); + j->code_bits += 8; + } while (j->code_bits <= 24); +} + +// (1 << n) - 1 +static const stbi__uint32 stbi__bmask[17]={0,1,3,7,15,31,63,127,255,511,1023,2047,4095,8191,16383,32767,65535}; + +// decode a jpeg huffman value from the bitstream +stbi_inline static int stbi__jpeg_huff_decode(stbi__jpeg *j, stbi__huffman *h) +{ + unsigned int temp; + int c,k; + + if (j->code_bits < 16) stbi__grow_buffer_unsafe(j); + + // look at the top FAST_BITS and determine what symbol ID it is, + // if the code is <= FAST_BITS + c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS)-1); + k = h->fast[c]; + if (k < 255) { + int s = h->size[k]; + if (s > j->code_bits) + return -1; + j->code_buffer <<= s; + j->code_bits -= s; + return h->values[k]; + } + + // naive test is to shift the code_buffer down so k bits are + // valid, then test against maxcode. To speed this up, we've + // preshifted maxcode left so that it has (16-k) 0s at the + // end; in other words, regardless of the number of bits, it + // wants to be compared against something shifted to have 16; + // that way we don't need to shift inside the loop. + temp = j->code_buffer >> 16; + for (k=FAST_BITS+1 ; ; ++k) + if (temp < h->maxcode[k]) + break; + if (k == 17) { + // error! code not found + j->code_bits -= 16; + return -1; + } + + if (k > j->code_bits) + return -1; + + // convert the huffman code to the symbol id + c = ((j->code_buffer >> (32 - k)) & stbi__bmask[k]) + h->delta[k]; + STBI_ASSERT((((j->code_buffer) >> (32 - h->size[c])) & stbi__bmask[h->size[c]]) == h->code[c]); + + // convert the id to a symbol + j->code_bits -= k; + j->code_buffer <<= k; + return h->values[c]; +} + +// bias[n] = (-1<code_bits < n) stbi__grow_buffer_unsafe(j); + + sgn = (stbi__int32)j->code_buffer >> 31; // sign bit is always in MSB + k = stbi_lrot(j->code_buffer, n); + STBI_ASSERT(n >= 0 && n < (int) (sizeof(stbi__bmask)/sizeof(*stbi__bmask))); + j->code_buffer = k & ~stbi__bmask[n]; + k &= stbi__bmask[n]; + j->code_bits -= n; + return k + (stbi__jbias[n] & ~sgn); +} + +// get some unsigned bits +stbi_inline static int stbi__jpeg_get_bits(stbi__jpeg *j, int n) +{ + unsigned int k; + if (j->code_bits < n) stbi__grow_buffer_unsafe(j); + k = stbi_lrot(j->code_buffer, n); + j->code_buffer = k & ~stbi__bmask[n]; + k &= stbi__bmask[n]; + j->code_bits -= n; + return k; +} + +stbi_inline static int stbi__jpeg_get_bit(stbi__jpeg *j) +{ + unsigned int k; + if (j->code_bits < 1) stbi__grow_buffer_unsafe(j); + k = j->code_buffer; + j->code_buffer <<= 1; + --j->code_bits; + return k & 0x80000000; +} + +// given a value that's at position X in the zigzag stream, +// where does it appear in the 8x8 matrix coded as row-major? +static const stbi_uc stbi__jpeg_dezigzag[64+15] = +{ + 0, 1, 8, 16, 9, 2, 3, 10, + 17, 24, 32, 25, 18, 11, 4, 5, + 12, 19, 26, 33, 40, 48, 41, 34, + 27, 20, 13, 6, 7, 14, 21, 28, + 35, 42, 49, 56, 57, 50, 43, 36, + 29, 22, 15, 23, 30, 37, 44, 51, + 58, 59, 52, 45, 38, 31, 39, 46, + 53, 60, 61, 54, 47, 55, 62, 63, + // let corrupt input sample past end + 63, 63, 63, 63, 63, 63, 63, 63, + 63, 63, 63, 63, 63, 63, 63 +}; + +// decode one 64-entry block-- +static int stbi__jpeg_decode_block(stbi__jpeg *j, short data[64], stbi__huffman *hdc, stbi__huffman *hac, stbi__int16 *fac, int b, stbi__uint16 *dequant) +{ + int diff,dc,k; + int t; + + if (j->code_bits < 16) stbi__grow_buffer_unsafe(j); + t = stbi__jpeg_huff_decode(j, hdc); + if (t < 0) return stbi__err("bad huffman code","Corrupt JPEG"); + + // 0 all the ac values now so we can do it 32-bits at a time + memset(data,0,64*sizeof(data[0])); + + diff = t ? stbi__extend_receive(j, t) : 0; + dc = j->img_comp[b].dc_pred + diff; + j->img_comp[b].dc_pred = dc; + data[0] = (short) (dc * dequant[0]); + + // decode AC components, see JPEG spec + k = 1; + do { + unsigned int zig; + int c,r,s; + if (j->code_bits < 16) stbi__grow_buffer_unsafe(j); + c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS)-1); + r = fac[c]; + if (r) { // fast-AC path + k += (r >> 4) & 15; // run + s = r & 15; // combined length + j->code_buffer <<= s; + j->code_bits -= s; + // decode into unzigzag'd location + zig = stbi__jpeg_dezigzag[k++]; + data[zig] = (short) ((r >> 8) * dequant[zig]); + } else { + int rs = stbi__jpeg_huff_decode(j, hac); + if (rs < 0) return stbi__err("bad huffman code","Corrupt JPEG"); + s = rs & 15; + r = rs >> 4; + if (s == 0) { + if (rs != 0xf0) break; // end block + k += 16; + } else { + k += r; + // decode into unzigzag'd location + zig = stbi__jpeg_dezigzag[k++]; + data[zig] = (short) (stbi__extend_receive(j,s) * dequant[zig]); + } + } + } while (k < 64); + return 1; +} + +static int stbi__jpeg_decode_block_prog_dc(stbi__jpeg *j, short data[64], stbi__huffman *hdc, int b) +{ + int diff,dc; + int t; + if (j->spec_end != 0) return stbi__err("can't merge dc and ac", "Corrupt JPEG"); + + if (j->code_bits < 16) stbi__grow_buffer_unsafe(j); + + if (j->succ_high == 0) { + // first scan for DC coefficient, must be first + memset(data,0,64*sizeof(data[0])); // 0 all the ac values now + t = stbi__jpeg_huff_decode(j, hdc); + diff = t ? stbi__extend_receive(j, t) : 0; + + dc = j->img_comp[b].dc_pred + diff; + j->img_comp[b].dc_pred = dc; + data[0] = (short) (dc << j->succ_low); + } else { + // refinement scan for DC coefficient + if (stbi__jpeg_get_bit(j)) + data[0] += (short) (1 << j->succ_low); + } + return 1; +} + +// @OPTIMIZE: store non-zigzagged during the decode passes, +// and only de-zigzag when dequantizing +static int stbi__jpeg_decode_block_prog_ac(stbi__jpeg *j, short data[64], stbi__huffman *hac, stbi__int16 *fac) +{ + int k; + if (j->spec_start == 0) return stbi__err("can't merge dc and ac", "Corrupt JPEG"); + + if (j->succ_high == 0) { + int shift = j->succ_low; + + if (j->eob_run) { + --j->eob_run; + return 1; + } + + k = j->spec_start; + do { + unsigned int zig; + int c,r,s; + if (j->code_bits < 16) stbi__grow_buffer_unsafe(j); + c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS)-1); + r = fac[c]; + if (r) { // fast-AC path + k += (r >> 4) & 15; // run + s = r & 15; // combined length + j->code_buffer <<= s; + j->code_bits -= s; + zig = stbi__jpeg_dezigzag[k++]; + data[zig] = (short) ((r >> 8) << shift); + } else { + int rs = stbi__jpeg_huff_decode(j, hac); + if (rs < 0) return stbi__err("bad huffman code","Corrupt JPEG"); + s = rs & 15; + r = rs >> 4; + if (s == 0) { + if (r < 15) { + j->eob_run = (1 << r); + if (r) + j->eob_run += stbi__jpeg_get_bits(j, r); + --j->eob_run; + break; + } + k += 16; + } else { + k += r; + zig = stbi__jpeg_dezigzag[k++]; + data[zig] = (short) (stbi__extend_receive(j,s) << shift); + } + } + } while (k <= j->spec_end); + } else { + // refinement scan for these AC coefficients + + short bit = (short) (1 << j->succ_low); + + if (j->eob_run) { + --j->eob_run; + for (k = j->spec_start; k <= j->spec_end; ++k) { + short *p = &data[stbi__jpeg_dezigzag[k]]; + if (*p != 0) + if (stbi__jpeg_get_bit(j)) + if ((*p & bit)==0) { + if (*p > 0) + *p += bit; + else + *p -= bit; + } + } + } else { + k = j->spec_start; + do { + int r,s; + int rs = stbi__jpeg_huff_decode(j, hac); // @OPTIMIZE see if we can use the fast path here, advance-by-r is so slow, eh + if (rs < 0) return stbi__err("bad huffman code","Corrupt JPEG"); + s = rs & 15; + r = rs >> 4; + if (s == 0) { + if (r < 15) { + j->eob_run = (1 << r) - 1; + if (r) + j->eob_run += stbi__jpeg_get_bits(j, r); + r = 64; // force end of block + } else { + // r=15 s=0 should write 16 0s, so we just do + // a run of 15 0s and then write s (which is 0), + // so we don't have to do anything special here + } + } else { + if (s != 1) return stbi__err("bad huffman code", "Corrupt JPEG"); + // sign bit + if (stbi__jpeg_get_bit(j)) + s = bit; + else + s = -bit; + } + + // advance by r + while (k <= j->spec_end) { + short *p = &data[stbi__jpeg_dezigzag[k++]]; + if (*p != 0) { + if (stbi__jpeg_get_bit(j)) + if ((*p & bit)==0) { + if (*p > 0) + *p += bit; + else + *p -= bit; + } + } else { + if (r == 0) { + *p = (short) s; + break; + } + --r; + } + } + } while (k <= j->spec_end); + } + } + return 1; +} + +// take a -128..127 value and stbi__clamp it and convert to 0..255 +stbi_inline static stbi_uc stbi__clamp(int x) +{ + // trick to use a single test to catch both cases + if ((unsigned int) x > 255) { + if (x < 0) return 0; + if (x > 255) return 255; + } + return (stbi_uc) x; +} + +#define stbi__f2f(x) ((int) (((x) * 4096 + 0.5))) +#define stbi__fsh(x) ((x) * 4096) + +// derived from jidctint -- DCT_ISLOW +#define STBI__IDCT_1D(s0,s1,s2,s3,s4,s5,s6,s7) \ + int t0,t1,t2,t3,p1,p2,p3,p4,p5,x0,x1,x2,x3; \ + p2 = s2; \ + p3 = s6; \ + p1 = (p2+p3) * stbi__f2f(0.5411961f); \ + t2 = p1 + p3*stbi__f2f(-1.847759065f); \ + t3 = p1 + p2*stbi__f2f( 0.765366865f); \ + p2 = s0; \ + p3 = s4; \ + t0 = stbi__fsh(p2+p3); \ + t1 = stbi__fsh(p2-p3); \ + x0 = t0+t3; \ + x3 = t0-t3; \ + x1 = t1+t2; \ + x2 = t1-t2; \ + t0 = s7; \ + t1 = s5; \ + t2 = s3; \ + t3 = s1; \ + p3 = t0+t2; \ + p4 = t1+t3; \ + p1 = t0+t3; \ + p2 = t1+t2; \ + p5 = (p3+p4)*stbi__f2f( 1.175875602f); \ + t0 = t0*stbi__f2f( 0.298631336f); \ + t1 = t1*stbi__f2f( 2.053119869f); \ + t2 = t2*stbi__f2f( 3.072711026f); \ + t3 = t3*stbi__f2f( 1.501321110f); \ + p1 = p5 + p1*stbi__f2f(-0.899976223f); \ + p2 = p5 + p2*stbi__f2f(-2.562915447f); \ + p3 = p3*stbi__f2f(-1.961570560f); \ + p4 = p4*stbi__f2f(-0.390180644f); \ + t3 += p1+p4; \ + t2 += p2+p3; \ + t1 += p2+p4; \ + t0 += p1+p3; + +static void stbi__idct_block(stbi_uc *out, int out_stride, short data[64]) +{ + int i,val[64],*v=val; + stbi_uc *o; + short *d = data; + + // columns + for (i=0; i < 8; ++i,++d, ++v) { + // if all zeroes, shortcut -- this avoids dequantizing 0s and IDCTing + if (d[ 8]==0 && d[16]==0 && d[24]==0 && d[32]==0 + && d[40]==0 && d[48]==0 && d[56]==0) { + // no shortcut 0 seconds + // (1|2|3|4|5|6|7)==0 0 seconds + // all separate -0.047 seconds + // 1 && 2|3 && 4|5 && 6|7: -0.047 seconds + int dcterm = d[0]*4; + v[0] = v[8] = v[16] = v[24] = v[32] = v[40] = v[48] = v[56] = dcterm; + } else { + STBI__IDCT_1D(d[ 0],d[ 8],d[16],d[24],d[32],d[40],d[48],d[56]) + // constants scaled things up by 1<<12; let's bring them back + // down, but keep 2 extra bits of precision + x0 += 512; x1 += 512; x2 += 512; x3 += 512; + v[ 0] = (x0+t3) >> 10; + v[56] = (x0-t3) >> 10; + v[ 8] = (x1+t2) >> 10; + v[48] = (x1-t2) >> 10; + v[16] = (x2+t1) >> 10; + v[40] = (x2-t1) >> 10; + v[24] = (x3+t0) >> 10; + v[32] = (x3-t0) >> 10; + } + } + + for (i=0, v=val, o=out; i < 8; ++i,v+=8,o+=out_stride) { + // no fast case since the first 1D IDCT spread components out + STBI__IDCT_1D(v[0],v[1],v[2],v[3],v[4],v[5],v[6],v[7]) + // constants scaled things up by 1<<12, plus we had 1<<2 from first + // loop, plus horizontal and vertical each scale by sqrt(8) so together + // we've got an extra 1<<3, so 1<<17 total we need to remove. + // so we want to round that, which means adding 0.5 * 1<<17, + // aka 65536. Also, we'll end up with -128 to 127 that we want + // to encode as 0..255 by adding 128, so we'll add that before the shift + x0 += 65536 + (128<<17); + x1 += 65536 + (128<<17); + x2 += 65536 + (128<<17); + x3 += 65536 + (128<<17); + // tried computing the shifts into temps, or'ing the temps to see + // if any were out of range, but that was slower + o[0] = stbi__clamp((x0+t3) >> 17); + o[7] = stbi__clamp((x0-t3) >> 17); + o[1] = stbi__clamp((x1+t2) >> 17); + o[6] = stbi__clamp((x1-t2) >> 17); + o[2] = stbi__clamp((x2+t1) >> 17); + o[5] = stbi__clamp((x2-t1) >> 17); + o[3] = stbi__clamp((x3+t0) >> 17); + o[4] = stbi__clamp((x3-t0) >> 17); + } +} + +#ifdef STBI_SSE2 +// sse2 integer IDCT. not the fastest possible implementation but it +// produces bit-identical results to the generic C version so it's +// fully "transparent". +static void stbi__idct_simd(stbi_uc *out, int out_stride, short data[64]) +{ + // This is constructed to match our regular (generic) integer IDCT exactly. + __m128i row0, row1, row2, row3, row4, row5, row6, row7; + __m128i tmp; + + // dot product constant: even elems=x, odd elems=y + #define dct_const(x,y) _mm_setr_epi16((x),(y),(x),(y),(x),(y),(x),(y)) + + // out(0) = c0[even]*x + c0[odd]*y (c0, x, y 16-bit, out 32-bit) + // out(1) = c1[even]*x + c1[odd]*y + #define dct_rot(out0,out1, x,y,c0,c1) \ + __m128i c0##lo = _mm_unpacklo_epi16((x),(y)); \ + __m128i c0##hi = _mm_unpackhi_epi16((x),(y)); \ + __m128i out0##_l = _mm_madd_epi16(c0##lo, c0); \ + __m128i out0##_h = _mm_madd_epi16(c0##hi, c0); \ + __m128i out1##_l = _mm_madd_epi16(c0##lo, c1); \ + __m128i out1##_h = _mm_madd_epi16(c0##hi, c1) + + // out = in << 12 (in 16-bit, out 32-bit) + #define dct_widen(out, in) \ + __m128i out##_l = _mm_srai_epi32(_mm_unpacklo_epi16(_mm_setzero_si128(), (in)), 4); \ + __m128i out##_h = _mm_srai_epi32(_mm_unpackhi_epi16(_mm_setzero_si128(), (in)), 4) + + // wide add + #define dct_wadd(out, a, b) \ + __m128i out##_l = _mm_add_epi32(a##_l, b##_l); \ + __m128i out##_h = _mm_add_epi32(a##_h, b##_h) + + // wide sub + #define dct_wsub(out, a, b) \ + __m128i out##_l = _mm_sub_epi32(a##_l, b##_l); \ + __m128i out##_h = _mm_sub_epi32(a##_h, b##_h) + + // butterfly a/b, add bias, then shift by "s" and pack + #define dct_bfly32o(out0, out1, a,b,bias,s) \ + { \ + __m128i abiased_l = _mm_add_epi32(a##_l, bias); \ + __m128i abiased_h = _mm_add_epi32(a##_h, bias); \ + dct_wadd(sum, abiased, b); \ + dct_wsub(dif, abiased, b); \ + out0 = _mm_packs_epi32(_mm_srai_epi32(sum_l, s), _mm_srai_epi32(sum_h, s)); \ + out1 = _mm_packs_epi32(_mm_srai_epi32(dif_l, s), _mm_srai_epi32(dif_h, s)); \ + } + + // 8-bit interleave step (for transposes) + #define dct_interleave8(a, b) \ + tmp = a; \ + a = _mm_unpacklo_epi8(a, b); \ + b = _mm_unpackhi_epi8(tmp, b) + + // 16-bit interleave step (for transposes) + #define dct_interleave16(a, b) \ + tmp = a; \ + a = _mm_unpacklo_epi16(a, b); \ + b = _mm_unpackhi_epi16(tmp, b) + + #define dct_pass(bias,shift) \ + { \ + /* even part */ \ + dct_rot(t2e,t3e, row2,row6, rot0_0,rot0_1); \ + __m128i sum04 = _mm_add_epi16(row0, row4); \ + __m128i dif04 = _mm_sub_epi16(row0, row4); \ + dct_widen(t0e, sum04); \ + dct_widen(t1e, dif04); \ + dct_wadd(x0, t0e, t3e); \ + dct_wsub(x3, t0e, t3e); \ + dct_wadd(x1, t1e, t2e); \ + dct_wsub(x2, t1e, t2e); \ + /* odd part */ \ + dct_rot(y0o,y2o, row7,row3, rot2_0,rot2_1); \ + dct_rot(y1o,y3o, row5,row1, rot3_0,rot3_1); \ + __m128i sum17 = _mm_add_epi16(row1, row7); \ + __m128i sum35 = _mm_add_epi16(row3, row5); \ + dct_rot(y4o,y5o, sum17,sum35, rot1_0,rot1_1); \ + dct_wadd(x4, y0o, y4o); \ + dct_wadd(x5, y1o, y5o); \ + dct_wadd(x6, y2o, y5o); \ + dct_wadd(x7, y3o, y4o); \ + dct_bfly32o(row0,row7, x0,x7,bias,shift); \ + dct_bfly32o(row1,row6, x1,x6,bias,shift); \ + dct_bfly32o(row2,row5, x2,x5,bias,shift); \ + dct_bfly32o(row3,row4, x3,x4,bias,shift); \ + } + + __m128i rot0_0 = dct_const(stbi__f2f(0.5411961f), stbi__f2f(0.5411961f) + stbi__f2f(-1.847759065f)); + __m128i rot0_1 = dct_const(stbi__f2f(0.5411961f) + stbi__f2f( 0.765366865f), stbi__f2f(0.5411961f)); + __m128i rot1_0 = dct_const(stbi__f2f(1.175875602f) + stbi__f2f(-0.899976223f), stbi__f2f(1.175875602f)); + __m128i rot1_1 = dct_const(stbi__f2f(1.175875602f), stbi__f2f(1.175875602f) + stbi__f2f(-2.562915447f)); + __m128i rot2_0 = dct_const(stbi__f2f(-1.961570560f) + stbi__f2f( 0.298631336f), stbi__f2f(-1.961570560f)); + __m128i rot2_1 = dct_const(stbi__f2f(-1.961570560f), stbi__f2f(-1.961570560f) + stbi__f2f( 3.072711026f)); + __m128i rot3_0 = dct_const(stbi__f2f(-0.390180644f) + stbi__f2f( 2.053119869f), stbi__f2f(-0.390180644f)); + __m128i rot3_1 = dct_const(stbi__f2f(-0.390180644f), stbi__f2f(-0.390180644f) + stbi__f2f( 1.501321110f)); + + // rounding biases in column/row passes, see stbi__idct_block for explanation. + __m128i bias_0 = _mm_set1_epi32(512); + __m128i bias_1 = _mm_set1_epi32(65536 + (128<<17)); + + // load + row0 = _mm_load_si128((const __m128i *) (data + 0*8)); + row1 = _mm_load_si128((const __m128i *) (data + 1*8)); + row2 = _mm_load_si128((const __m128i *) (data + 2*8)); + row3 = _mm_load_si128((const __m128i *) (data + 3*8)); + row4 = _mm_load_si128((const __m128i *) (data + 4*8)); + row5 = _mm_load_si128((const __m128i *) (data + 5*8)); + row6 = _mm_load_si128((const __m128i *) (data + 6*8)); + row7 = _mm_load_si128((const __m128i *) (data + 7*8)); + + // column pass + dct_pass(bias_0, 10); + + { + // 16bit 8x8 transpose pass 1 + dct_interleave16(row0, row4); + dct_interleave16(row1, row5); + dct_interleave16(row2, row6); + dct_interleave16(row3, row7); + + // transpose pass 2 + dct_interleave16(row0, row2); + dct_interleave16(row1, row3); + dct_interleave16(row4, row6); + dct_interleave16(row5, row7); + + // transpose pass 3 + dct_interleave16(row0, row1); + dct_interleave16(row2, row3); + dct_interleave16(row4, row5); + dct_interleave16(row6, row7); + } + + // row pass + dct_pass(bias_1, 17); + + { + // pack + __m128i p0 = _mm_packus_epi16(row0, row1); // a0a1a2a3...a7b0b1b2b3...b7 + __m128i p1 = _mm_packus_epi16(row2, row3); + __m128i p2 = _mm_packus_epi16(row4, row5); + __m128i p3 = _mm_packus_epi16(row6, row7); + + // 8bit 8x8 transpose pass 1 + dct_interleave8(p0, p2); // a0e0a1e1... + dct_interleave8(p1, p3); // c0g0c1g1... + + // transpose pass 2 + dct_interleave8(p0, p1); // a0c0e0g0... + dct_interleave8(p2, p3); // b0d0f0h0... + + // transpose pass 3 + dct_interleave8(p0, p2); // a0b0c0d0... + dct_interleave8(p1, p3); // a4b4c4d4... + + // store + _mm_storel_epi64((__m128i *) out, p0); out += out_stride; + _mm_storel_epi64((__m128i *) out, _mm_shuffle_epi32(p0, 0x4e)); out += out_stride; + _mm_storel_epi64((__m128i *) out, p2); out += out_stride; + _mm_storel_epi64((__m128i *) out, _mm_shuffle_epi32(p2, 0x4e)); out += out_stride; + _mm_storel_epi64((__m128i *) out, p1); out += out_stride; + _mm_storel_epi64((__m128i *) out, _mm_shuffle_epi32(p1, 0x4e)); out += out_stride; + _mm_storel_epi64((__m128i *) out, p3); out += out_stride; + _mm_storel_epi64((__m128i *) out, _mm_shuffle_epi32(p3, 0x4e)); + } + +#undef dct_const +#undef dct_rot +#undef dct_widen +#undef dct_wadd +#undef dct_wsub +#undef dct_bfly32o +#undef dct_interleave8 +#undef dct_interleave16 +#undef dct_pass +} + +#endif // STBI_SSE2 + +#ifdef STBI_NEON + +// NEON integer IDCT. should produce bit-identical +// results to the generic C version. +static void stbi__idct_simd(stbi_uc *out, int out_stride, short data[64]) +{ + int16x8_t row0, row1, row2, row3, row4, row5, row6, row7; + + int16x4_t rot0_0 = vdup_n_s16(stbi__f2f(0.5411961f)); + int16x4_t rot0_1 = vdup_n_s16(stbi__f2f(-1.847759065f)); + int16x4_t rot0_2 = vdup_n_s16(stbi__f2f( 0.765366865f)); + int16x4_t rot1_0 = vdup_n_s16(stbi__f2f( 1.175875602f)); + int16x4_t rot1_1 = vdup_n_s16(stbi__f2f(-0.899976223f)); + int16x4_t rot1_2 = vdup_n_s16(stbi__f2f(-2.562915447f)); + int16x4_t rot2_0 = vdup_n_s16(stbi__f2f(-1.961570560f)); + int16x4_t rot2_1 = vdup_n_s16(stbi__f2f(-0.390180644f)); + int16x4_t rot3_0 = vdup_n_s16(stbi__f2f( 0.298631336f)); + int16x4_t rot3_1 = vdup_n_s16(stbi__f2f( 2.053119869f)); + int16x4_t rot3_2 = vdup_n_s16(stbi__f2f( 3.072711026f)); + int16x4_t rot3_3 = vdup_n_s16(stbi__f2f( 1.501321110f)); + +#define dct_long_mul(out, inq, coeff) \ + int32x4_t out##_l = vmull_s16(vget_low_s16(inq), coeff); \ + int32x4_t out##_h = vmull_s16(vget_high_s16(inq), coeff) + +#define dct_long_mac(out, acc, inq, coeff) \ + int32x4_t out##_l = vmlal_s16(acc##_l, vget_low_s16(inq), coeff); \ + int32x4_t out##_h = vmlal_s16(acc##_h, vget_high_s16(inq), coeff) + +#define dct_widen(out, inq) \ + int32x4_t out##_l = vshll_n_s16(vget_low_s16(inq), 12); \ + int32x4_t out##_h = vshll_n_s16(vget_high_s16(inq), 12) + +// wide add +#define dct_wadd(out, a, b) \ + int32x4_t out##_l = vaddq_s32(a##_l, b##_l); \ + int32x4_t out##_h = vaddq_s32(a##_h, b##_h) + +// wide sub +#define dct_wsub(out, a, b) \ + int32x4_t out##_l = vsubq_s32(a##_l, b##_l); \ + int32x4_t out##_h = vsubq_s32(a##_h, b##_h) + +// butterfly a/b, then shift using "shiftop" by "s" and pack +#define dct_bfly32o(out0,out1, a,b,shiftop,s) \ + { \ + dct_wadd(sum, a, b); \ + dct_wsub(dif, a, b); \ + out0 = vcombine_s16(shiftop(sum_l, s), shiftop(sum_h, s)); \ + out1 = vcombine_s16(shiftop(dif_l, s), shiftop(dif_h, s)); \ + } + +#define dct_pass(shiftop, shift) \ + { \ + /* even part */ \ + int16x8_t sum26 = vaddq_s16(row2, row6); \ + dct_long_mul(p1e, sum26, rot0_0); \ + dct_long_mac(t2e, p1e, row6, rot0_1); \ + dct_long_mac(t3e, p1e, row2, rot0_2); \ + int16x8_t sum04 = vaddq_s16(row0, row4); \ + int16x8_t dif04 = vsubq_s16(row0, row4); \ + dct_widen(t0e, sum04); \ + dct_widen(t1e, dif04); \ + dct_wadd(x0, t0e, t3e); \ + dct_wsub(x3, t0e, t3e); \ + dct_wadd(x1, t1e, t2e); \ + dct_wsub(x2, t1e, t2e); \ + /* odd part */ \ + int16x8_t sum15 = vaddq_s16(row1, row5); \ + int16x8_t sum17 = vaddq_s16(row1, row7); \ + int16x8_t sum35 = vaddq_s16(row3, row5); \ + int16x8_t sum37 = vaddq_s16(row3, row7); \ + int16x8_t sumodd = vaddq_s16(sum17, sum35); \ + dct_long_mul(p5o, sumodd, rot1_0); \ + dct_long_mac(p1o, p5o, sum17, rot1_1); \ + dct_long_mac(p2o, p5o, sum35, rot1_2); \ + dct_long_mul(p3o, sum37, rot2_0); \ + dct_long_mul(p4o, sum15, rot2_1); \ + dct_wadd(sump13o, p1o, p3o); \ + dct_wadd(sump24o, p2o, p4o); \ + dct_wadd(sump23o, p2o, p3o); \ + dct_wadd(sump14o, p1o, p4o); \ + dct_long_mac(x4, sump13o, row7, rot3_0); \ + dct_long_mac(x5, sump24o, row5, rot3_1); \ + dct_long_mac(x6, sump23o, row3, rot3_2); \ + dct_long_mac(x7, sump14o, row1, rot3_3); \ + dct_bfly32o(row0,row7, x0,x7,shiftop,shift); \ + dct_bfly32o(row1,row6, x1,x6,shiftop,shift); \ + dct_bfly32o(row2,row5, x2,x5,shiftop,shift); \ + dct_bfly32o(row3,row4, x3,x4,shiftop,shift); \ + } + + // load + row0 = vld1q_s16(data + 0*8); + row1 = vld1q_s16(data + 1*8); + row2 = vld1q_s16(data + 2*8); + row3 = vld1q_s16(data + 3*8); + row4 = vld1q_s16(data + 4*8); + row5 = vld1q_s16(data + 5*8); + row6 = vld1q_s16(data + 6*8); + row7 = vld1q_s16(data + 7*8); + + // add DC bias + row0 = vaddq_s16(row0, vsetq_lane_s16(1024, vdupq_n_s16(0), 0)); + + // column pass + dct_pass(vrshrn_n_s32, 10); + + // 16bit 8x8 transpose + { +// these three map to a single VTRN.16, VTRN.32, and VSWP, respectively. +// whether compilers actually get this is another story, sadly. +#define dct_trn16(x, y) { int16x8x2_t t = vtrnq_s16(x, y); x = t.val[0]; y = t.val[1]; } +#define dct_trn32(x, y) { int32x4x2_t t = vtrnq_s32(vreinterpretq_s32_s16(x), vreinterpretq_s32_s16(y)); x = vreinterpretq_s16_s32(t.val[0]); y = vreinterpretq_s16_s32(t.val[1]); } +#define dct_trn64(x, y) { int16x8_t x0 = x; int16x8_t y0 = y; x = vcombine_s16(vget_low_s16(x0), vget_low_s16(y0)); y = vcombine_s16(vget_high_s16(x0), vget_high_s16(y0)); } + + // pass 1 + dct_trn16(row0, row1); // a0b0a2b2a4b4a6b6 + dct_trn16(row2, row3); + dct_trn16(row4, row5); + dct_trn16(row6, row7); + + // pass 2 + dct_trn32(row0, row2); // a0b0c0d0a4b4c4d4 + dct_trn32(row1, row3); + dct_trn32(row4, row6); + dct_trn32(row5, row7); + + // pass 3 + dct_trn64(row0, row4); // a0b0c0d0e0f0g0h0 + dct_trn64(row1, row5); + dct_trn64(row2, row6); + dct_trn64(row3, row7); + +#undef dct_trn16 +#undef dct_trn32 +#undef dct_trn64 + } + + // row pass + // vrshrn_n_s32 only supports shifts up to 16, we need + // 17. so do a non-rounding shift of 16 first then follow + // up with a rounding shift by 1. + dct_pass(vshrn_n_s32, 16); + + { + // pack and round + uint8x8_t p0 = vqrshrun_n_s16(row0, 1); + uint8x8_t p1 = vqrshrun_n_s16(row1, 1); + uint8x8_t p2 = vqrshrun_n_s16(row2, 1); + uint8x8_t p3 = vqrshrun_n_s16(row3, 1); + uint8x8_t p4 = vqrshrun_n_s16(row4, 1); + uint8x8_t p5 = vqrshrun_n_s16(row5, 1); + uint8x8_t p6 = vqrshrun_n_s16(row6, 1); + uint8x8_t p7 = vqrshrun_n_s16(row7, 1); + + // again, these can translate into one instruction, but often don't. +#define dct_trn8_8(x, y) { uint8x8x2_t t = vtrn_u8(x, y); x = t.val[0]; y = t.val[1]; } +#define dct_trn8_16(x, y) { uint16x4x2_t t = vtrn_u16(vreinterpret_u16_u8(x), vreinterpret_u16_u8(y)); x = vreinterpret_u8_u16(t.val[0]); y = vreinterpret_u8_u16(t.val[1]); } +#define dct_trn8_32(x, y) { uint32x2x2_t t = vtrn_u32(vreinterpret_u32_u8(x), vreinterpret_u32_u8(y)); x = vreinterpret_u8_u32(t.val[0]); y = vreinterpret_u8_u32(t.val[1]); } + + // sadly can't use interleaved stores here since we only write + // 8 bytes to each scan line! + + // 8x8 8-bit transpose pass 1 + dct_trn8_8(p0, p1); + dct_trn8_8(p2, p3); + dct_trn8_8(p4, p5); + dct_trn8_8(p6, p7); + + // pass 2 + dct_trn8_16(p0, p2); + dct_trn8_16(p1, p3); + dct_trn8_16(p4, p6); + dct_trn8_16(p5, p7); + + // pass 3 + dct_trn8_32(p0, p4); + dct_trn8_32(p1, p5); + dct_trn8_32(p2, p6); + dct_trn8_32(p3, p7); + + // store + vst1_u8(out, p0); out += out_stride; + vst1_u8(out, p1); out += out_stride; + vst1_u8(out, p2); out += out_stride; + vst1_u8(out, p3); out += out_stride; + vst1_u8(out, p4); out += out_stride; + vst1_u8(out, p5); out += out_stride; + vst1_u8(out, p6); out += out_stride; + vst1_u8(out, p7); + +#undef dct_trn8_8 +#undef dct_trn8_16 +#undef dct_trn8_32 + } + +#undef dct_long_mul +#undef dct_long_mac +#undef dct_widen +#undef dct_wadd +#undef dct_wsub +#undef dct_bfly32o +#undef dct_pass +} + +#endif // STBI_NEON + +#define STBI__MARKER_none 0xff +// if there's a pending marker from the entropy stream, return that +// otherwise, fetch from the stream and get a marker. if there's no +// marker, return 0xff, which is never a valid marker value +static stbi_uc stbi__get_marker(stbi__jpeg *j) +{ + stbi_uc x; + if (j->marker != STBI__MARKER_none) { x = j->marker; j->marker = STBI__MARKER_none; return x; } + x = stbi__get8(j->s); + if (x != 0xff) return STBI__MARKER_none; + while (x == 0xff) + x = stbi__get8(j->s); // consume repeated 0xff fill bytes + return x; +} + +// in each scan, we'll have scan_n components, and the order +// of the components is specified by order[] +#define STBI__RESTART(x) ((x) >= 0xd0 && (x) <= 0xd7) + +// after a restart interval, stbi__jpeg_reset the entropy decoder and +// the dc prediction +static void stbi__jpeg_reset(stbi__jpeg *j) +{ + j->code_bits = 0; + j->code_buffer = 0; + j->nomore = 0; + j->img_comp[0].dc_pred = j->img_comp[1].dc_pred = j->img_comp[2].dc_pred = j->img_comp[3].dc_pred = 0; + j->marker = STBI__MARKER_none; + j->todo = j->restart_interval ? j->restart_interval : 0x7fffffff; + j->eob_run = 0; + // no more than 1<<31 MCUs if no restart_interal? that's plenty safe, + // since we don't even allow 1<<30 pixels +} + +static int stbi__parse_entropy_coded_data(stbi__jpeg *z) +{ + stbi__jpeg_reset(z); + if (!z->progressive) { + if (z->scan_n == 1) { + int i,j; + STBI_SIMD_ALIGN(short, data[64]); + int n = z->order[0]; + // non-interleaved data, we just need to process one block at a time, + // in trivial scanline order + // number of blocks to do just depends on how many actual "pixels" this + // component has, independent of interleaved MCU blocking and such + int w = (z->img_comp[n].x+7) >> 3; + int h = (z->img_comp[n].y+7) >> 3; + for (j=0; j < h; ++j) { + for (i=0; i < w; ++i) { + int ha = z->img_comp[n].ha; + if (!stbi__jpeg_decode_block(z, data, z->huff_dc+z->img_comp[n].hd, z->huff_ac+ha, z->fast_ac[ha], n, z->dequant[z->img_comp[n].tq])) return 0; + z->idct_block_kernel(z->img_comp[n].data+z->img_comp[n].w2*j*8+i*8, z->img_comp[n].w2, data); + // every data block is an MCU, so countdown the restart interval + if (--z->todo <= 0) { + if (z->code_bits < 24) stbi__grow_buffer_unsafe(z); + // if it's NOT a restart, then just bail, so we get corrupt data + // rather than no data + if (!STBI__RESTART(z->marker)) return 1; + stbi__jpeg_reset(z); + } + } + } + return 1; + } else { // interleaved + int i,j,k,x,y; + STBI_SIMD_ALIGN(short, data[64]); + for (j=0; j < z->img_mcu_y; ++j) { + for (i=0; i < z->img_mcu_x; ++i) { + // scan an interleaved mcu... process scan_n components in order + for (k=0; k < z->scan_n; ++k) { + int n = z->order[k]; + // scan out an mcu's worth of this component; that's just determined + // by the basic H and V specified for the component + for (y=0; y < z->img_comp[n].v; ++y) { + for (x=0; x < z->img_comp[n].h; ++x) { + int x2 = (i*z->img_comp[n].h + x)*8; + int y2 = (j*z->img_comp[n].v + y)*8; + int ha = z->img_comp[n].ha; + if (!stbi__jpeg_decode_block(z, data, z->huff_dc+z->img_comp[n].hd, z->huff_ac+ha, z->fast_ac[ha], n, z->dequant[z->img_comp[n].tq])) return 0; + z->idct_block_kernel(z->img_comp[n].data+z->img_comp[n].w2*y2+x2, z->img_comp[n].w2, data); + } + } + } + // after all interleaved components, that's an interleaved MCU, + // so now count down the restart interval + if (--z->todo <= 0) { + if (z->code_bits < 24) stbi__grow_buffer_unsafe(z); + if (!STBI__RESTART(z->marker)) return 1; + stbi__jpeg_reset(z); + } + } + } + return 1; + } + } else { + if (z->scan_n == 1) { + int i,j; + int n = z->order[0]; + // non-interleaved data, we just need to process one block at a time, + // in trivial scanline order + // number of blocks to do just depends on how many actual "pixels" this + // component has, independent of interleaved MCU blocking and such + int w = (z->img_comp[n].x+7) >> 3; + int h = (z->img_comp[n].y+7) >> 3; + for (j=0; j < h; ++j) { + for (i=0; i < w; ++i) { + short *data = z->img_comp[n].coeff + 64 * (i + j * z->img_comp[n].coeff_w); + if (z->spec_start == 0) { + if (!stbi__jpeg_decode_block_prog_dc(z, data, &z->huff_dc[z->img_comp[n].hd], n)) + return 0; + } else { + int ha = z->img_comp[n].ha; + if (!stbi__jpeg_decode_block_prog_ac(z, data, &z->huff_ac[ha], z->fast_ac[ha])) + return 0; + } + // every data block is an MCU, so countdown the restart interval + if (--z->todo <= 0) { + if (z->code_bits < 24) stbi__grow_buffer_unsafe(z); + if (!STBI__RESTART(z->marker)) return 1; + stbi__jpeg_reset(z); + } + } + } + return 1; + } else { // interleaved + int i,j,k,x,y; + for (j=0; j < z->img_mcu_y; ++j) { + for (i=0; i < z->img_mcu_x; ++i) { + // scan an interleaved mcu... process scan_n components in order + for (k=0; k < z->scan_n; ++k) { + int n = z->order[k]; + // scan out an mcu's worth of this component; that's just determined + // by the basic H and V specified for the component + for (y=0; y < z->img_comp[n].v; ++y) { + for (x=0; x < z->img_comp[n].h; ++x) { + int x2 = (i*z->img_comp[n].h + x); + int y2 = (j*z->img_comp[n].v + y); + short *data = z->img_comp[n].coeff + 64 * (x2 + y2 * z->img_comp[n].coeff_w); + if (!stbi__jpeg_decode_block_prog_dc(z, data, &z->huff_dc[z->img_comp[n].hd], n)) + return 0; + } + } + } + // after all interleaved components, that's an interleaved MCU, + // so now count down the restart interval + if (--z->todo <= 0) { + if (z->code_bits < 24) stbi__grow_buffer_unsafe(z); + if (!STBI__RESTART(z->marker)) return 1; + stbi__jpeg_reset(z); + } + } + } + return 1; + } + } +} + +static void stbi__jpeg_dequantize(short *data, stbi__uint16 *dequant) +{ + int i; + for (i=0; i < 64; ++i) + data[i] *= dequant[i]; +} + +static void stbi__jpeg_finish(stbi__jpeg *z) +{ + if (z->progressive) { + // dequantize and idct the data + int i,j,n; + for (n=0; n < z->s->img_n; ++n) { + int w = (z->img_comp[n].x+7) >> 3; + int h = (z->img_comp[n].y+7) >> 3; + for (j=0; j < h; ++j) { + for (i=0; i < w; ++i) { + short *data = z->img_comp[n].coeff + 64 * (i + j * z->img_comp[n].coeff_w); + stbi__jpeg_dequantize(data, z->dequant[z->img_comp[n].tq]); + z->idct_block_kernel(z->img_comp[n].data+z->img_comp[n].w2*j*8+i*8, z->img_comp[n].w2, data); + } + } + } + } +} + +static int stbi__process_marker(stbi__jpeg *z, int m) +{ + int L; + switch (m) { + case STBI__MARKER_none: // no marker found + return stbi__err("expected marker","Corrupt JPEG"); + + case 0xDD: // DRI - specify restart interval + if (stbi__get16be(z->s) != 4) return stbi__err("bad DRI len","Corrupt JPEG"); + z->restart_interval = stbi__get16be(z->s); + return 1; + + case 0xDB: // DQT - define quantization table + L = stbi__get16be(z->s)-2; + while (L > 0) { + int q = stbi__get8(z->s); + int p = q >> 4, sixteen = (p != 0); + int t = q & 15,i; + if (p != 0 && p != 1) return stbi__err("bad DQT type","Corrupt JPEG"); + if (t > 3) return stbi__err("bad DQT table","Corrupt JPEG"); + + for (i=0; i < 64; ++i) + z->dequant[t][stbi__jpeg_dezigzag[i]] = (stbi__uint16)(sixteen ? stbi__get16be(z->s) : stbi__get8(z->s)); + L -= (sixteen ? 129 : 65); + } + return L==0; + + case 0xC4: // DHT - define huffman table + L = stbi__get16be(z->s)-2; + while (L > 0) { + stbi_uc *v; + int sizes[16],i,n=0; + int q = stbi__get8(z->s); + int tc = q >> 4; + int th = q & 15; + if (tc > 1 || th > 3) return stbi__err("bad DHT header","Corrupt JPEG"); + for (i=0; i < 16; ++i) { + sizes[i] = stbi__get8(z->s); + n += sizes[i]; + } + L -= 17; + if (tc == 0) { + if (!stbi__build_huffman(z->huff_dc+th, sizes)) return 0; + v = z->huff_dc[th].values; + } else { + if (!stbi__build_huffman(z->huff_ac+th, sizes)) return 0; + v = z->huff_ac[th].values; + } + for (i=0; i < n; ++i) + v[i] = stbi__get8(z->s); + if (tc != 0) + stbi__build_fast_ac(z->fast_ac[th], z->huff_ac + th); + L -= n; + } + return L==0; + } + + // check for comment block or APP blocks + if ((m >= 0xE0 && m <= 0xEF) || m == 0xFE) { + L = stbi__get16be(z->s); + if (L < 2) { + if (m == 0xFE) + return stbi__err("bad COM len","Corrupt JPEG"); + else + return stbi__err("bad APP len","Corrupt JPEG"); + } + L -= 2; + + if (m == 0xE0 && L >= 5) { // JFIF APP0 segment + static const unsigned char tag[5] = {'J','F','I','F','\0'}; + int ok = 1; + int i; + for (i=0; i < 5; ++i) + if (stbi__get8(z->s) != tag[i]) + ok = 0; + L -= 5; + if (ok) + z->jfif = 1; + } else if (m == 0xEE && L >= 12) { // Adobe APP14 segment + static const unsigned char tag[6] = {'A','d','o','b','e','\0'}; + int ok = 1; + int i; + for (i=0; i < 6; ++i) + if (stbi__get8(z->s) != tag[i]) + ok = 0; + L -= 6; + if (ok) { + stbi__get8(z->s); // version + stbi__get16be(z->s); // flags0 + stbi__get16be(z->s); // flags1 + z->app14_color_transform = stbi__get8(z->s); // color transform + L -= 6; + } + } + + stbi__skip(z->s, L); + return 1; + } + + return stbi__err("unknown marker","Corrupt JPEG"); +} + +// after we see SOS +static int stbi__process_scan_header(stbi__jpeg *z) +{ + int i; + int Ls = stbi__get16be(z->s); + z->scan_n = stbi__get8(z->s); + if (z->scan_n < 1 || z->scan_n > 4 || z->scan_n > (int) z->s->img_n) return stbi__err("bad SOS component count","Corrupt JPEG"); + if (Ls != 6+2*z->scan_n) return stbi__err("bad SOS len","Corrupt JPEG"); + for (i=0; i < z->scan_n; ++i) { + int id = stbi__get8(z->s), which; + int q = stbi__get8(z->s); + for (which = 0; which < z->s->img_n; ++which) + if (z->img_comp[which].id == id) + break; + if (which == z->s->img_n) return 0; // no match + z->img_comp[which].hd = q >> 4; if (z->img_comp[which].hd > 3) return stbi__err("bad DC huff","Corrupt JPEG"); + z->img_comp[which].ha = q & 15; if (z->img_comp[which].ha > 3) return stbi__err("bad AC huff","Corrupt JPEG"); + z->order[i] = which; + } + + { + int aa; + z->spec_start = stbi__get8(z->s); + z->spec_end = stbi__get8(z->s); // should be 63, but might be 0 + aa = stbi__get8(z->s); + z->succ_high = (aa >> 4); + z->succ_low = (aa & 15); + if (z->progressive) { + if (z->spec_start > 63 || z->spec_end > 63 || z->spec_start > z->spec_end || z->succ_high > 13 || z->succ_low > 13) + return stbi__err("bad SOS", "Corrupt JPEG"); + } else { + if (z->spec_start != 0) return stbi__err("bad SOS","Corrupt JPEG"); + if (z->succ_high != 0 || z->succ_low != 0) return stbi__err("bad SOS","Corrupt JPEG"); + z->spec_end = 63; + } + } + + return 1; +} + +static int stbi__free_jpeg_components(stbi__jpeg *z, int ncomp, int why) +{ + int i; + for (i=0; i < ncomp; ++i) { + if (z->img_comp[i].raw_data) { + STBI_FREE(z->img_comp[i].raw_data); + z->img_comp[i].raw_data = NULL; + z->img_comp[i].data = NULL; + } + if (z->img_comp[i].raw_coeff) { + STBI_FREE(z->img_comp[i].raw_coeff); + z->img_comp[i].raw_coeff = 0; + z->img_comp[i].coeff = 0; + } + if (z->img_comp[i].linebuf) { + STBI_FREE(z->img_comp[i].linebuf); + z->img_comp[i].linebuf = NULL; + } + } + return why; +} + +static int stbi__process_frame_header(stbi__jpeg *z, int scan) +{ + stbi__context *s = z->s; + int Lf,p,i,q, h_max=1,v_max=1,c; + Lf = stbi__get16be(s); if (Lf < 11) return stbi__err("bad SOF len","Corrupt JPEG"); // JPEG + p = stbi__get8(s); if (p != 8) return stbi__err("only 8-bit","JPEG format not supported: 8-bit only"); // JPEG baseline + s->img_y = stbi__get16be(s); if (s->img_y == 0) return stbi__err("no header height", "JPEG format not supported: delayed height"); // Legal, but we don't handle it--but neither does IJG + s->img_x = stbi__get16be(s); if (s->img_x == 0) return stbi__err("0 width","Corrupt JPEG"); // JPEG requires + c = stbi__get8(s); + if (c != 3 && c != 1 && c != 4) return stbi__err("bad component count","Corrupt JPEG"); + s->img_n = c; + for (i=0; i < c; ++i) { + z->img_comp[i].data = NULL; + z->img_comp[i].linebuf = NULL; + } + + if (Lf != 8+3*s->img_n) return stbi__err("bad SOF len","Corrupt JPEG"); + + z->rgb = 0; + for (i=0; i < s->img_n; ++i) { + static const unsigned char rgb[3] = { 'R', 'G', 'B' }; + z->img_comp[i].id = stbi__get8(s); + if (s->img_n == 3 && z->img_comp[i].id == rgb[i]) + ++z->rgb; + q = stbi__get8(s); + z->img_comp[i].h = (q >> 4); if (!z->img_comp[i].h || z->img_comp[i].h > 4) return stbi__err("bad H","Corrupt JPEG"); + z->img_comp[i].v = q & 15; if (!z->img_comp[i].v || z->img_comp[i].v > 4) return stbi__err("bad V","Corrupt JPEG"); + z->img_comp[i].tq = stbi__get8(s); if (z->img_comp[i].tq > 3) return stbi__err("bad TQ","Corrupt JPEG"); + } + + if (scan != STBI__SCAN_load) return 1; + + if (!stbi__mad3sizes_valid(s->img_x, s->img_y, s->img_n, 0)) return stbi__err("too large", "Image too large to decode"); + + for (i=0; i < s->img_n; ++i) { + if (z->img_comp[i].h > h_max) h_max = z->img_comp[i].h; + if (z->img_comp[i].v > v_max) v_max = z->img_comp[i].v; + } + + // compute interleaved mcu info + z->img_h_max = h_max; + z->img_v_max = v_max; + z->img_mcu_w = h_max * 8; + z->img_mcu_h = v_max * 8; + // these sizes can't be more than 17 bits + z->img_mcu_x = (s->img_x + z->img_mcu_w-1) / z->img_mcu_w; + z->img_mcu_y = (s->img_y + z->img_mcu_h-1) / z->img_mcu_h; + + for (i=0; i < s->img_n; ++i) { + // number of effective pixels (e.g. for non-interleaved MCU) + z->img_comp[i].x = (s->img_x * z->img_comp[i].h + h_max-1) / h_max; + z->img_comp[i].y = (s->img_y * z->img_comp[i].v + v_max-1) / v_max; + // to simplify generation, we'll allocate enough memory to decode + // the bogus oversized data from using interleaved MCUs and their + // big blocks (e.g. a 16x16 iMCU on an image of width 33); we won't + // discard the extra data until colorspace conversion + // + // img_mcu_x, img_mcu_y: <=17 bits; comp[i].h and .v are <=4 (checked earlier) + // so these muls can't overflow with 32-bit ints (which we require) + z->img_comp[i].w2 = z->img_mcu_x * z->img_comp[i].h * 8; + z->img_comp[i].h2 = z->img_mcu_y * z->img_comp[i].v * 8; + z->img_comp[i].coeff = 0; + z->img_comp[i].raw_coeff = 0; + z->img_comp[i].linebuf = NULL; + z->img_comp[i].raw_data = stbi__malloc_mad2(z->img_comp[i].w2, z->img_comp[i].h2, 15); + if (z->img_comp[i].raw_data == NULL) + return stbi__free_jpeg_components(z, i+1, stbi__err("outofmem", "Out of memory")); + // align blocks for idct using mmx/sse + z->img_comp[i].data = (stbi_uc*) (((size_t) z->img_comp[i].raw_data + 15) & ~15); + if (z->progressive) { + // w2, h2 are multiples of 8 (see above) + z->img_comp[i].coeff_w = z->img_comp[i].w2 / 8; + z->img_comp[i].coeff_h = z->img_comp[i].h2 / 8; + z->img_comp[i].raw_coeff = stbi__malloc_mad3(z->img_comp[i].w2, z->img_comp[i].h2, sizeof(short), 15); + if (z->img_comp[i].raw_coeff == NULL) + return stbi__free_jpeg_components(z, i+1, stbi__err("outofmem", "Out of memory")); + z->img_comp[i].coeff = (short*) (((size_t) z->img_comp[i].raw_coeff + 15) & ~15); + } + } + + return 1; +} + +// use comparisons since in some cases we handle more than one case (e.g. SOF) +#define stbi__DNL(x) ((x) == 0xdc) +#define stbi__SOI(x) ((x) == 0xd8) +#define stbi__EOI(x) ((x) == 0xd9) +#define stbi__SOF(x) ((x) == 0xc0 || (x) == 0xc1 || (x) == 0xc2) +#define stbi__SOS(x) ((x) == 0xda) + +#define stbi__SOF_progressive(x) ((x) == 0xc2) + +static int stbi__decode_jpeg_header(stbi__jpeg *z, int scan) +{ + int m; + z->jfif = 0; + z->app14_color_transform = -1; // valid values are 0,1,2 + z->marker = STBI__MARKER_none; // initialize cached marker to empty + m = stbi__get_marker(z); + if (!stbi__SOI(m)) return stbi__err("no SOI","Corrupt JPEG"); + if (scan == STBI__SCAN_type) return 1; + m = stbi__get_marker(z); + while (!stbi__SOF(m)) { + if (!stbi__process_marker(z,m)) return 0; + m = stbi__get_marker(z); + while (m == STBI__MARKER_none) { + // some files have extra padding after their blocks, so ok, we'll scan + if (stbi__at_eof(z->s)) return stbi__err("no SOF", "Corrupt JPEG"); + m = stbi__get_marker(z); + } + } + z->progressive = stbi__SOF_progressive(m); + if (!stbi__process_frame_header(z, scan)) return 0; + return 1; +} + +// decode image to YCbCr format +static int stbi__decode_jpeg_image(stbi__jpeg *j) +{ + int m; + for (m = 0; m < 4; m++) { + j->img_comp[m].raw_data = NULL; + j->img_comp[m].raw_coeff = NULL; + } + j->restart_interval = 0; + if (!stbi__decode_jpeg_header(j, STBI__SCAN_load)) return 0; + m = stbi__get_marker(j); + while (!stbi__EOI(m)) { + if (stbi__SOS(m)) { + if (!stbi__process_scan_header(j)) return 0; + if (!stbi__parse_entropy_coded_data(j)) return 0; + if (j->marker == STBI__MARKER_none ) { + // handle 0s at the end of image data from IP Kamera 9060 + while (!stbi__at_eof(j->s)) { + int x = stbi__get8(j->s); + if (x == 255) { + j->marker = stbi__get8(j->s); + break; + } + } + // if we reach eof without hitting a marker, stbi__get_marker() below will fail and we'll eventually return 0 + } + } else if (stbi__DNL(m)) { + int Ld = stbi__get16be(j->s); + stbi__uint32 NL = stbi__get16be(j->s); + if (Ld != 4) return stbi__err("bad DNL len", "Corrupt JPEG"); + if (NL != j->s->img_y) return stbi__err("bad DNL height", "Corrupt JPEG"); + } else { + if (!stbi__process_marker(j, m)) return 0; + } + m = stbi__get_marker(j); + } + if (j->progressive) + stbi__jpeg_finish(j); + return 1; +} + +// static jfif-centered resampling (across block boundaries) + +typedef stbi_uc *(*resample_row_func)(stbi_uc *out, stbi_uc *in0, stbi_uc *in1, + int w, int hs); + +#define stbi__div4(x) ((stbi_uc) ((x) >> 2)) + +static stbi_uc *resample_row_1(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs) +{ + STBI_NOTUSED(out); + STBI_NOTUSED(in_far); + STBI_NOTUSED(w); + STBI_NOTUSED(hs); + return in_near; +} + +static stbi_uc* stbi__resample_row_v_2(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs) +{ + // need to generate two samples vertically for every one in input + int i; + STBI_NOTUSED(hs); + for (i=0; i < w; ++i) + out[i] = stbi__div4(3*in_near[i] + in_far[i] + 2); + return out; +} + +static stbi_uc* stbi__resample_row_h_2(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs) +{ + // need to generate two samples horizontally for every one in input + int i; + stbi_uc *input = in_near; + + if (w == 1) { + // if only one sample, can't do any interpolation + out[0] = out[1] = input[0]; + return out; + } + + out[0] = input[0]; + out[1] = stbi__div4(input[0]*3 + input[1] + 2); + for (i=1; i < w-1; ++i) { + int n = 3*input[i]+2; + out[i*2+0] = stbi__div4(n+input[i-1]); + out[i*2+1] = stbi__div4(n+input[i+1]); + } + out[i*2+0] = stbi__div4(input[w-2]*3 + input[w-1] + 2); + out[i*2+1] = input[w-1]; + + STBI_NOTUSED(in_far); + STBI_NOTUSED(hs); + + return out; +} + +#define stbi__div16(x) ((stbi_uc) ((x) >> 4)) + +static stbi_uc *stbi__resample_row_hv_2(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs) +{ + // need to generate 2x2 samples for every one in input + int i,t0,t1; + if (w == 1) { + out[0] = out[1] = stbi__div4(3*in_near[0] + in_far[0] + 2); + return out; + } + + t1 = 3*in_near[0] + in_far[0]; + out[0] = stbi__div4(t1+2); + for (i=1; i < w; ++i) { + t0 = t1; + t1 = 3*in_near[i]+in_far[i]; + out[i*2-1] = stbi__div16(3*t0 + t1 + 8); + out[i*2 ] = stbi__div16(3*t1 + t0 + 8); + } + out[w*2-1] = stbi__div4(t1+2); + + STBI_NOTUSED(hs); + + return out; +} + +#if defined(STBI_SSE2) || defined(STBI_NEON) +static stbi_uc *stbi__resample_row_hv_2_simd(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs) +{ + // need to generate 2x2 samples for every one in input + int i=0,t0,t1; + + if (w == 1) { + out[0] = out[1] = stbi__div4(3*in_near[0] + in_far[0] + 2); + return out; + } + + t1 = 3*in_near[0] + in_far[0]; + // process groups of 8 pixels for as long as we can. + // note we can't handle the last pixel in a row in this loop + // because we need to handle the filter boundary conditions. + for (; i < ((w-1) & ~7); i += 8) { +#if defined(STBI_SSE2) + // load and perform the vertical filtering pass + // this uses 3*x + y = 4*x + (y - x) + __m128i zero = _mm_setzero_si128(); + __m128i farb = _mm_loadl_epi64((__m128i *) (in_far + i)); + __m128i nearb = _mm_loadl_epi64((__m128i *) (in_near + i)); + __m128i farw = _mm_unpacklo_epi8(farb, zero); + __m128i nearw = _mm_unpacklo_epi8(nearb, zero); + __m128i diff = _mm_sub_epi16(farw, nearw); + __m128i nears = _mm_slli_epi16(nearw, 2); + __m128i curr = _mm_add_epi16(nears, diff); // current row + + // horizontal filter works the same based on shifted vers of current + // row. "prev" is current row shifted right by 1 pixel; we need to + // insert the previous pixel value (from t1). + // "next" is current row shifted left by 1 pixel, with first pixel + // of next block of 8 pixels added in. + __m128i prv0 = _mm_slli_si128(curr, 2); + __m128i nxt0 = _mm_srli_si128(curr, 2); + __m128i prev = _mm_insert_epi16(prv0, t1, 0); + __m128i next = _mm_insert_epi16(nxt0, 3*in_near[i+8] + in_far[i+8], 7); + + // horizontal filter, polyphase implementation since it's convenient: + // even pixels = 3*cur + prev = cur*4 + (prev - cur) + // odd pixels = 3*cur + next = cur*4 + (next - cur) + // note the shared term. + __m128i bias = _mm_set1_epi16(8); + __m128i curs = _mm_slli_epi16(curr, 2); + __m128i prvd = _mm_sub_epi16(prev, curr); + __m128i nxtd = _mm_sub_epi16(next, curr); + __m128i curb = _mm_add_epi16(curs, bias); + __m128i even = _mm_add_epi16(prvd, curb); + __m128i odd = _mm_add_epi16(nxtd, curb); + + // interleave even and odd pixels, then undo scaling. + __m128i int0 = _mm_unpacklo_epi16(even, odd); + __m128i int1 = _mm_unpackhi_epi16(even, odd); + __m128i de0 = _mm_srli_epi16(int0, 4); + __m128i de1 = _mm_srli_epi16(int1, 4); + + // pack and write output + __m128i outv = _mm_packus_epi16(de0, de1); + _mm_storeu_si128((__m128i *) (out + i*2), outv); +#elif defined(STBI_NEON) + // load and perform the vertical filtering pass + // this uses 3*x + y = 4*x + (y - x) + uint8x8_t farb = vld1_u8(in_far + i); + uint8x8_t nearb = vld1_u8(in_near + i); + int16x8_t diff = vreinterpretq_s16_u16(vsubl_u8(farb, nearb)); + int16x8_t nears = vreinterpretq_s16_u16(vshll_n_u8(nearb, 2)); + int16x8_t curr = vaddq_s16(nears, diff); // current row + + // horizontal filter works the same based on shifted vers of current + // row. "prev" is current row shifted right by 1 pixel; we need to + // insert the previous pixel value (from t1). + // "next" is current row shifted left by 1 pixel, with first pixel + // of next block of 8 pixels added in. + int16x8_t prv0 = vextq_s16(curr, curr, 7); + int16x8_t nxt0 = vextq_s16(curr, curr, 1); + int16x8_t prev = vsetq_lane_s16(t1, prv0, 0); + int16x8_t next = vsetq_lane_s16(3*in_near[i+8] + in_far[i+8], nxt0, 7); + + // horizontal filter, polyphase implementation since it's convenient: + // even pixels = 3*cur + prev = cur*4 + (prev - cur) + // odd pixels = 3*cur + next = cur*4 + (next - cur) + // note the shared term. + int16x8_t curs = vshlq_n_s16(curr, 2); + int16x8_t prvd = vsubq_s16(prev, curr); + int16x8_t nxtd = vsubq_s16(next, curr); + int16x8_t even = vaddq_s16(curs, prvd); + int16x8_t odd = vaddq_s16(curs, nxtd); + + // undo scaling and round, then store with even/odd phases interleaved + uint8x8x2_t o; + o.val[0] = vqrshrun_n_s16(even, 4); + o.val[1] = vqrshrun_n_s16(odd, 4); + vst2_u8(out + i*2, o); +#endif + + // "previous" value for next iter + t1 = 3*in_near[i+7] + in_far[i+7]; + } + + t0 = t1; + t1 = 3*in_near[i] + in_far[i]; + out[i*2] = stbi__div16(3*t1 + t0 + 8); + + for (++i; i < w; ++i) { + t0 = t1; + t1 = 3*in_near[i]+in_far[i]; + out[i*2-1] = stbi__div16(3*t0 + t1 + 8); + out[i*2 ] = stbi__div16(3*t1 + t0 + 8); + } + out[w*2-1] = stbi__div4(t1+2); + + STBI_NOTUSED(hs); + + return out; +} +#endif + +static stbi_uc *stbi__resample_row_generic(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs) +{ + // resample with nearest-neighbor + int i,j; + STBI_NOTUSED(in_far); + for (i=0; i < w; ++i) + for (j=0; j < hs; ++j) + out[i*hs+j] = in_near[i]; + return out; +} + +// this is a reduced-precision calculation of YCbCr-to-RGB introduced +// to make sure the code produces the same results in both SIMD and scalar +#define stbi__float2fixed(x) (((int) ((x) * 4096.0f + 0.5f)) << 8) +static void stbi__YCbCr_to_RGB_row(stbi_uc *out, const stbi_uc *y, const stbi_uc *pcb, const stbi_uc *pcr, int count, int step) +{ + int i; + for (i=0; i < count; ++i) { + int y_fixed = (y[i] << 20) + (1<<19); // rounding + int r,g,b; + int cr = pcr[i] - 128; + int cb = pcb[i] - 128; + r = y_fixed + cr* stbi__float2fixed(1.40200f); + g = y_fixed + (cr*-stbi__float2fixed(0.71414f)) + ((cb*-stbi__float2fixed(0.34414f)) & 0xffff0000); + b = y_fixed + cb* stbi__float2fixed(1.77200f); + r >>= 20; + g >>= 20; + b >>= 20; + if ((unsigned) r > 255) { if (r < 0) r = 0; else r = 255; } + if ((unsigned) g > 255) { if (g < 0) g = 0; else g = 255; } + if ((unsigned) b > 255) { if (b < 0) b = 0; else b = 255; } + out[0] = (stbi_uc)r; + out[1] = (stbi_uc)g; + out[2] = (stbi_uc)b; + out[3] = 255; + out += step; + } +} + +#if defined(STBI_SSE2) || defined(STBI_NEON) +static void stbi__YCbCr_to_RGB_simd(stbi_uc *out, stbi_uc const *y, stbi_uc const *pcb, stbi_uc const *pcr, int count, int step) +{ + int i = 0; + +#ifdef STBI_SSE2 + // step == 3 is pretty ugly on the final interleave, and i'm not convinced + // it's useful in practice (you wouldn't use it for textures, for example). + // so just accelerate step == 4 case. + if (step == 4) { + // this is a fairly straightforward implementation and not super-optimized. + __m128i signflip = _mm_set1_epi8(-0x80); + __m128i cr_const0 = _mm_set1_epi16( (short) ( 1.40200f*4096.0f+0.5f)); + __m128i cr_const1 = _mm_set1_epi16( - (short) ( 0.71414f*4096.0f+0.5f)); + __m128i cb_const0 = _mm_set1_epi16( - (short) ( 0.34414f*4096.0f+0.5f)); + __m128i cb_const1 = _mm_set1_epi16( (short) ( 1.77200f*4096.0f+0.5f)); + __m128i y_bias = _mm_set1_epi8((char) (unsigned char) 128); + __m128i xw = _mm_set1_epi16(255); // alpha channel + + for (; i+7 < count; i += 8) { + // load + __m128i y_bytes = _mm_loadl_epi64((__m128i *) (y+i)); + __m128i cr_bytes = _mm_loadl_epi64((__m128i *) (pcr+i)); + __m128i cb_bytes = _mm_loadl_epi64((__m128i *) (pcb+i)); + __m128i cr_biased = _mm_xor_si128(cr_bytes, signflip); // -128 + __m128i cb_biased = _mm_xor_si128(cb_bytes, signflip); // -128 + + // unpack to short (and left-shift cr, cb by 8) + __m128i yw = _mm_unpacklo_epi8(y_bias, y_bytes); + __m128i crw = _mm_unpacklo_epi8(_mm_setzero_si128(), cr_biased); + __m128i cbw = _mm_unpacklo_epi8(_mm_setzero_si128(), cb_biased); + + // color transform + __m128i yws = _mm_srli_epi16(yw, 4); + __m128i cr0 = _mm_mulhi_epi16(cr_const0, crw); + __m128i cb0 = _mm_mulhi_epi16(cb_const0, cbw); + __m128i cb1 = _mm_mulhi_epi16(cbw, cb_const1); + __m128i cr1 = _mm_mulhi_epi16(crw, cr_const1); + __m128i rws = _mm_add_epi16(cr0, yws); + __m128i gwt = _mm_add_epi16(cb0, yws); + __m128i bws = _mm_add_epi16(yws, cb1); + __m128i gws = _mm_add_epi16(gwt, cr1); + + // descale + __m128i rw = _mm_srai_epi16(rws, 4); + __m128i bw = _mm_srai_epi16(bws, 4); + __m128i gw = _mm_srai_epi16(gws, 4); + + // back to byte, set up for transpose + __m128i brb = _mm_packus_epi16(rw, bw); + __m128i gxb = _mm_packus_epi16(gw, xw); + + // transpose to interleave channels + __m128i t0 = _mm_unpacklo_epi8(brb, gxb); + __m128i t1 = _mm_unpackhi_epi8(brb, gxb); + __m128i o0 = _mm_unpacklo_epi16(t0, t1); + __m128i o1 = _mm_unpackhi_epi16(t0, t1); + + // store + _mm_storeu_si128((__m128i *) (out + 0), o0); + _mm_storeu_si128((__m128i *) (out + 16), o1); + out += 32; + } + } +#endif + +#ifdef STBI_NEON + // in this version, step=3 support would be easy to add. but is there demand? + if (step == 4) { + // this is a fairly straightforward implementation and not super-optimized. + uint8x8_t signflip = vdup_n_u8(0x80); + int16x8_t cr_const0 = vdupq_n_s16( (short) ( 1.40200f*4096.0f+0.5f)); + int16x8_t cr_const1 = vdupq_n_s16( - (short) ( 0.71414f*4096.0f+0.5f)); + int16x8_t cb_const0 = vdupq_n_s16( - (short) ( 0.34414f*4096.0f+0.5f)); + int16x8_t cb_const1 = vdupq_n_s16( (short) ( 1.77200f*4096.0f+0.5f)); + + for (; i+7 < count; i += 8) { + // load + uint8x8_t y_bytes = vld1_u8(y + i); + uint8x8_t cr_bytes = vld1_u8(pcr + i); + uint8x8_t cb_bytes = vld1_u8(pcb + i); + int8x8_t cr_biased = vreinterpret_s8_u8(vsub_u8(cr_bytes, signflip)); + int8x8_t cb_biased = vreinterpret_s8_u8(vsub_u8(cb_bytes, signflip)); + + // expand to s16 + int16x8_t yws = vreinterpretq_s16_u16(vshll_n_u8(y_bytes, 4)); + int16x8_t crw = vshll_n_s8(cr_biased, 7); + int16x8_t cbw = vshll_n_s8(cb_biased, 7); + + // color transform + int16x8_t cr0 = vqdmulhq_s16(crw, cr_const0); + int16x8_t cb0 = vqdmulhq_s16(cbw, cb_const0); + int16x8_t cr1 = vqdmulhq_s16(crw, cr_const1); + int16x8_t cb1 = vqdmulhq_s16(cbw, cb_const1); + int16x8_t rws = vaddq_s16(yws, cr0); + int16x8_t gws = vaddq_s16(vaddq_s16(yws, cb0), cr1); + int16x8_t bws = vaddq_s16(yws, cb1); + + // undo scaling, round, convert to byte + uint8x8x4_t o; + o.val[0] = vqrshrun_n_s16(rws, 4); + o.val[1] = vqrshrun_n_s16(gws, 4); + o.val[2] = vqrshrun_n_s16(bws, 4); + o.val[3] = vdup_n_u8(255); + + // store, interleaving r/g/b/a + vst4_u8(out, o); + out += 8*4; + } + } +#endif + + for (; i < count; ++i) { + int y_fixed = (y[i] << 20) + (1<<19); // rounding + int r,g,b; + int cr = pcr[i] - 128; + int cb = pcb[i] - 128; + r = y_fixed + cr* stbi__float2fixed(1.40200f); + g = y_fixed + cr*-stbi__float2fixed(0.71414f) + ((cb*-stbi__float2fixed(0.34414f)) & 0xffff0000); + b = y_fixed + cb* stbi__float2fixed(1.77200f); + r >>= 20; + g >>= 20; + b >>= 20; + if ((unsigned) r > 255) { if (r < 0) r = 0; else r = 255; } + if ((unsigned) g > 255) { if (g < 0) g = 0; else g = 255; } + if ((unsigned) b > 255) { if (b < 0) b = 0; else b = 255; } + out[0] = (stbi_uc)r; + out[1] = (stbi_uc)g; + out[2] = (stbi_uc)b; + out[3] = 255; + out += step; + } +} +#endif + +// set up the kernels +static void stbi__setup_jpeg(stbi__jpeg *j) +{ + j->idct_block_kernel = stbi__idct_block; + j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_row; + j->resample_row_hv_2_kernel = stbi__resample_row_hv_2; + +#ifdef STBI_SSE2 + if (stbi__sse2_available()) { + j->idct_block_kernel = stbi__idct_simd; + j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_simd; + j->resample_row_hv_2_kernel = stbi__resample_row_hv_2_simd; + } +#endif + +#ifdef STBI_NEON + j->idct_block_kernel = stbi__idct_simd; + j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_simd; + j->resample_row_hv_2_kernel = stbi__resample_row_hv_2_simd; +#endif +} + +// clean up the temporary component buffers +static void stbi__cleanup_jpeg(stbi__jpeg *j) +{ + stbi__free_jpeg_components(j, j->s->img_n, 0); +} + +typedef struct +{ + resample_row_func resample; + stbi_uc *line0,*line1; + int hs,vs; // expansion factor in each axis + int w_lores; // horizontal pixels pre-expansion + int ystep; // how far through vertical expansion we are + int ypos; // which pre-expansion row we're on +} stbi__resample; + +// fast 0..255 * 0..255 => 0..255 rounded multiplication +static stbi_uc stbi__blinn_8x8(stbi_uc x, stbi_uc y) +{ + unsigned int t = x*y + 128; + return (stbi_uc) ((t + (t >>8)) >> 8); +} + +static stbi_uc *load_jpeg_image(stbi__jpeg *z, int *out_x, int *out_y, int *comp, int req_comp) +{ + int n, decode_n, is_rgb; + z->s->img_n = 0; // make stbi__cleanup_jpeg safe + + // validate req_comp + if (req_comp < 0 || req_comp > 4) return stbi__errpuc("bad req_comp", "Internal error"); + + // load a jpeg image from whichever source, but leave in YCbCr format + if (!stbi__decode_jpeg_image(z)) { stbi__cleanup_jpeg(z); return NULL; } + + // determine actual number of components to generate + n = req_comp ? req_comp : z->s->img_n >= 3 ? 3 : 1; + + is_rgb = z->s->img_n == 3 && (z->rgb == 3 || (z->app14_color_transform == 0 && !z->jfif)); + + if (z->s->img_n == 3 && n < 3 && !is_rgb) + decode_n = 1; + else + decode_n = z->s->img_n; + + // resample and color-convert + { + int k; + unsigned int i,j; + stbi_uc *output; + stbi_uc *coutput[4]; + + stbi__resample res_comp[4]; + + for (k=0; k < decode_n; ++k) { + stbi__resample *r = &res_comp[k]; + + // allocate line buffer big enough for upsampling off the edges + // with upsample factor of 4 + z->img_comp[k].linebuf = (stbi_uc *) stbi__malloc(z->s->img_x + 3); + if (!z->img_comp[k].linebuf) { stbi__cleanup_jpeg(z); return stbi__errpuc("outofmem", "Out of memory"); } + + r->hs = z->img_h_max / z->img_comp[k].h; + r->vs = z->img_v_max / z->img_comp[k].v; + r->ystep = r->vs >> 1; + r->w_lores = (z->s->img_x + r->hs-1) / r->hs; + r->ypos = 0; + r->line0 = r->line1 = z->img_comp[k].data; + + if (r->hs == 1 && r->vs == 1) r->resample = resample_row_1; + else if (r->hs == 1 && r->vs == 2) r->resample = stbi__resample_row_v_2; + else if (r->hs == 2 && r->vs == 1) r->resample = stbi__resample_row_h_2; + else if (r->hs == 2 && r->vs == 2) r->resample = z->resample_row_hv_2_kernel; + else r->resample = stbi__resample_row_generic; + } + + // can't error after this so, this is safe + output = (stbi_uc *) stbi__malloc_mad3(n, z->s->img_x, z->s->img_y, 1); + if (!output) { stbi__cleanup_jpeg(z); return stbi__errpuc("outofmem", "Out of memory"); } + + // now go ahead and resample + for (j=0; j < z->s->img_y; ++j) { + stbi_uc *out = output + n * z->s->img_x * j; + for (k=0; k < decode_n; ++k) { + stbi__resample *r = &res_comp[k]; + int y_bot = r->ystep >= (r->vs >> 1); + coutput[k] = r->resample(z->img_comp[k].linebuf, + y_bot ? r->line1 : r->line0, + y_bot ? r->line0 : r->line1, + r->w_lores, r->hs); + if (++r->ystep >= r->vs) { + r->ystep = 0; + r->line0 = r->line1; + if (++r->ypos < z->img_comp[k].y) + r->line1 += z->img_comp[k].w2; + } + } + if (n >= 3) { + stbi_uc *y = coutput[0]; + if (z->s->img_n == 3) { + if (is_rgb) { + for (i=0; i < z->s->img_x; ++i) { + out[0] = y[i]; + out[1] = coutput[1][i]; + out[2] = coutput[2][i]; + out[3] = 255; + out += n; + } + } else { + z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2], z->s->img_x, n); + } + } else if (z->s->img_n == 4) { + if (z->app14_color_transform == 0) { // CMYK + for (i=0; i < z->s->img_x; ++i) { + stbi_uc m = coutput[3][i]; + out[0] = stbi__blinn_8x8(coutput[0][i], m); + out[1] = stbi__blinn_8x8(coutput[1][i], m); + out[2] = stbi__blinn_8x8(coutput[2][i], m); + out[3] = 255; + out += n; + } + } else if (z->app14_color_transform == 2) { // YCCK + z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2], z->s->img_x, n); + for (i=0; i < z->s->img_x; ++i) { + stbi_uc m = coutput[3][i]; + out[0] = stbi__blinn_8x8(255 - out[0], m); + out[1] = stbi__blinn_8x8(255 - out[1], m); + out[2] = stbi__blinn_8x8(255 - out[2], m); + out += n; + } + } else { // YCbCr + alpha? Ignore the fourth channel for now + z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2], z->s->img_x, n); + } + } else + for (i=0; i < z->s->img_x; ++i) { + out[0] = out[1] = out[2] = y[i]; + out[3] = 255; // not used if n==3 + out += n; + } + } else { + if (is_rgb) { + if (n == 1) + for (i=0; i < z->s->img_x; ++i) + *out++ = stbi__compute_y(coutput[0][i], coutput[1][i], coutput[2][i]); + else { + for (i=0; i < z->s->img_x; ++i, out += 2) { + out[0] = stbi__compute_y(coutput[0][i], coutput[1][i], coutput[2][i]); + out[1] = 255; + } + } + } else if (z->s->img_n == 4 && z->app14_color_transform == 0) { + for (i=0; i < z->s->img_x; ++i) { + stbi_uc m = coutput[3][i]; + stbi_uc r = stbi__blinn_8x8(coutput[0][i], m); + stbi_uc g = stbi__blinn_8x8(coutput[1][i], m); + stbi_uc b = stbi__blinn_8x8(coutput[2][i], m); + out[0] = stbi__compute_y(r, g, b); + out[1] = 255; + out += n; + } + } else if (z->s->img_n == 4 && z->app14_color_transform == 2) { + for (i=0; i < z->s->img_x; ++i) { + out[0] = stbi__blinn_8x8(255 - coutput[0][i], coutput[3][i]); + out[1] = 255; + out += n; + } + } else { + stbi_uc *y = coutput[0]; + if (n == 1) + for (i=0; i < z->s->img_x; ++i) out[i] = y[i]; + else + for (i=0; i < z->s->img_x; ++i) { *out++ = y[i]; *out++ = 255; } + } + } + } + stbi__cleanup_jpeg(z); + *out_x = z->s->img_x; + *out_y = z->s->img_y; + if (comp) *comp = z->s->img_n >= 3 ? 3 : 1; // report original components, not output + return output; + } +} + +static void *stbi__jpeg_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri) +{ + unsigned char* result; + stbi__jpeg* j = (stbi__jpeg*) stbi__malloc(sizeof(stbi__jpeg)); + STBI_NOTUSED(ri); + j->s = s; + stbi__setup_jpeg(j); + result = load_jpeg_image(j, x,y,comp,req_comp); + STBI_FREE(j); + return result; +} + +static int stbi__jpeg_test(stbi__context *s) +{ + int r; + stbi__jpeg* j = (stbi__jpeg*)stbi__malloc(sizeof(stbi__jpeg)); + j->s = s; + stbi__setup_jpeg(j); + r = stbi__decode_jpeg_header(j, STBI__SCAN_type); + stbi__rewind(s); + STBI_FREE(j); + return r; +} + +static int stbi__jpeg_info_raw(stbi__jpeg *j, int *x, int *y, int *comp) +{ + if (!stbi__decode_jpeg_header(j, STBI__SCAN_header)) { + stbi__rewind( j->s ); + return 0; + } + if (x) *x = j->s->img_x; + if (y) *y = j->s->img_y; + if (comp) *comp = j->s->img_n >= 3 ? 3 : 1; + return 1; +} + +static int stbi__jpeg_info(stbi__context *s, int *x, int *y, int *comp) +{ + int result; + stbi__jpeg* j = (stbi__jpeg*) (stbi__malloc(sizeof(stbi__jpeg))); + j->s = s; + result = stbi__jpeg_info_raw(j, x, y, comp); + STBI_FREE(j); + return result; +} +#endif + +// public domain zlib decode v0.2 Sean Barrett 2006-11-18 +// simple implementation +// - all input must be provided in an upfront buffer +// - all output is written to a single output buffer (can malloc/realloc) +// performance +// - fast huffman + +#ifndef STBI_NO_ZLIB + +// fast-way is faster to check than jpeg huffman, but slow way is slower +#define STBI__ZFAST_BITS 9 // accelerate all cases in default tables +#define STBI__ZFAST_MASK ((1 << STBI__ZFAST_BITS) - 1) + +// zlib-style huffman encoding +// (jpegs packs from left, zlib from right, so can't share code) +typedef struct +{ + stbi__uint16 fast[1 << STBI__ZFAST_BITS]; + stbi__uint16 firstcode[16]; + int maxcode[17]; + stbi__uint16 firstsymbol[16]; + stbi_uc size[288]; + stbi__uint16 value[288]; +} stbi__zhuffman; + +stbi_inline static int stbi__bitreverse16(int n) +{ + n = ((n & 0xAAAA) >> 1) | ((n & 0x5555) << 1); + n = ((n & 0xCCCC) >> 2) | ((n & 0x3333) << 2); + n = ((n & 0xF0F0) >> 4) | ((n & 0x0F0F) << 4); + n = ((n & 0xFF00) >> 8) | ((n & 0x00FF) << 8); + return n; +} + +stbi_inline static int stbi__bit_reverse(int v, int bits) +{ + STBI_ASSERT(bits <= 16); + // to bit reverse n bits, reverse 16 and shift + // e.g. 11 bits, bit reverse and shift away 5 + return stbi__bitreverse16(v) >> (16-bits); +} + +static int stbi__zbuild_huffman(stbi__zhuffman *z, const stbi_uc *sizelist, int num) +{ + int i,k=0; + int code, next_code[16], sizes[17]; + + // DEFLATE spec for generating codes + memset(sizes, 0, sizeof(sizes)); + memset(z->fast, 0, sizeof(z->fast)); + for (i=0; i < num; ++i) + ++sizes[sizelist[i]]; + sizes[0] = 0; + for (i=1; i < 16; ++i) + if (sizes[i] > (1 << i)) + return stbi__err("bad sizes", "Corrupt PNG"); + code = 0; + for (i=1; i < 16; ++i) { + next_code[i] = code; + z->firstcode[i] = (stbi__uint16) code; + z->firstsymbol[i] = (stbi__uint16) k; + code = (code + sizes[i]); + if (sizes[i]) + if (code-1 >= (1 << i)) return stbi__err("bad codelengths","Corrupt PNG"); + z->maxcode[i] = code << (16-i); // preshift for inner loop + code <<= 1; + k += sizes[i]; + } + z->maxcode[16] = 0x10000; // sentinel + for (i=0; i < num; ++i) { + int s = sizelist[i]; + if (s) { + int c = next_code[s] - z->firstcode[s] + z->firstsymbol[s]; + stbi__uint16 fastv = (stbi__uint16) ((s << 9) | i); + z->size [c] = (stbi_uc ) s; + z->value[c] = (stbi__uint16) i; + if (s <= STBI__ZFAST_BITS) { + int j = stbi__bit_reverse(next_code[s],s); + while (j < (1 << STBI__ZFAST_BITS)) { + z->fast[j] = fastv; + j += (1 << s); + } + } + ++next_code[s]; + } + } + return 1; +} + +// zlib-from-memory implementation for PNG reading +// because PNG allows splitting the zlib stream arbitrarily, +// and it's annoying structurally to have PNG call ZLIB call PNG, +// we require PNG read all the IDATs and combine them into a single +// memory buffer + +typedef struct +{ + stbi_uc *zbuffer, *zbuffer_end; + int num_bits; + stbi__uint32 code_buffer; + + char *zout; + char *zout_start; + char *zout_end; + int z_expandable; + + stbi__zhuffman z_length, z_distance; +} stbi__zbuf; + +stbi_inline static stbi_uc stbi__zget8(stbi__zbuf *z) +{ + if (z->zbuffer >= z->zbuffer_end) return 0; + return *z->zbuffer++; +} + +static void stbi__fill_bits(stbi__zbuf *z) +{ + do { + STBI_ASSERT(z->code_buffer < (1U << z->num_bits)); + z->code_buffer |= (unsigned int) stbi__zget8(z) << z->num_bits; + z->num_bits += 8; + } while (z->num_bits <= 24); +} + +stbi_inline static unsigned int stbi__zreceive(stbi__zbuf *z, int n) +{ + unsigned int k; + if (z->num_bits < n) stbi__fill_bits(z); + k = z->code_buffer & ((1 << n) - 1); + z->code_buffer >>= n; + z->num_bits -= n; + return k; +} + +static int stbi__zhuffman_decode_slowpath(stbi__zbuf *a, stbi__zhuffman *z) +{ + int b,s,k; + // not resolved by fast table, so compute it the slow way + // use jpeg approach, which requires MSbits at top + k = stbi__bit_reverse(a->code_buffer, 16); + for (s=STBI__ZFAST_BITS+1; ; ++s) + if (k < z->maxcode[s]) + break; + if (s == 16) return -1; // invalid code! + // code size is s, so: + b = (k >> (16-s)) - z->firstcode[s] + z->firstsymbol[s]; + STBI_ASSERT(z->size[b] == s); + a->code_buffer >>= s; + a->num_bits -= s; + return z->value[b]; +} + +stbi_inline static int stbi__zhuffman_decode(stbi__zbuf *a, stbi__zhuffman *z) +{ + int b,s; + if (a->num_bits < 16) stbi__fill_bits(a); + b = z->fast[a->code_buffer & STBI__ZFAST_MASK]; + if (b) { + s = b >> 9; + a->code_buffer >>= s; + a->num_bits -= s; + return b & 511; + } + return stbi__zhuffman_decode_slowpath(a, z); +} + +static int stbi__zexpand(stbi__zbuf *z, char *zout, int n) // need to make room for n bytes +{ + char *q; + int cur, limit, old_limit; + z->zout = zout; + if (!z->z_expandable) return stbi__err("output buffer limit","Corrupt PNG"); + cur = (int) (z->zout - z->zout_start); + limit = old_limit = (int) (z->zout_end - z->zout_start); + while (cur + n > limit) + limit *= 2; + q = (char *) STBI_REALLOC_SIZED(z->zout_start, old_limit, limit); + STBI_NOTUSED(old_limit); + if (q == NULL) return stbi__err("outofmem", "Out of memory"); + z->zout_start = q; + z->zout = q + cur; + z->zout_end = q + limit; + return 1; +} + +static const int stbi__zlength_base[31] = { + 3,4,5,6,7,8,9,10,11,13, + 15,17,19,23,27,31,35,43,51,59, + 67,83,99,115,131,163,195,227,258,0,0 }; + +static const int stbi__zlength_extra[31]= +{ 0,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,0,0,0 }; + +static const int stbi__zdist_base[32] = { 1,2,3,4,5,7,9,13,17,25,33,49,65,97,129,193, +257,385,513,769,1025,1537,2049,3073,4097,6145,8193,12289,16385,24577,0,0}; + +static const int stbi__zdist_extra[32] = +{ 0,0,0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,13,13}; + +static int stbi__parse_huffman_block(stbi__zbuf *a) +{ + char *zout = a->zout; + for(;;) { + int z = stbi__zhuffman_decode(a, &a->z_length); + if (z < 256) { + if (z < 0) return stbi__err("bad huffman code","Corrupt PNG"); // error in huffman codes + if (zout >= a->zout_end) { + if (!stbi__zexpand(a, zout, 1)) return 0; + zout = a->zout; + } + *zout++ = (char) z; + } else { + stbi_uc *p; + int len,dist; + if (z == 256) { + a->zout = zout; + return 1; + } + z -= 257; + len = stbi__zlength_base[z]; + if (stbi__zlength_extra[z]) len += stbi__zreceive(a, stbi__zlength_extra[z]); + z = stbi__zhuffman_decode(a, &a->z_distance); + if (z < 0) return stbi__err("bad huffman code","Corrupt PNG"); + dist = stbi__zdist_base[z]; + if (stbi__zdist_extra[z]) dist += stbi__zreceive(a, stbi__zdist_extra[z]); + if (zout - a->zout_start < dist) return stbi__err("bad dist","Corrupt PNG"); + if (zout + len > a->zout_end) { + if (!stbi__zexpand(a, zout, len)) return 0; + zout = a->zout; + } + p = (stbi_uc *) (zout - dist); + if (dist == 1) { // run of one byte; common in images. + stbi_uc v = *p; + if (len) { do *zout++ = v; while (--len); } + } else { + if (len) { do *zout++ = *p++; while (--len); } + } + } + } +} + +static int stbi__compute_huffman_codes(stbi__zbuf *a) +{ + static const stbi_uc length_dezigzag[19] = { 16,17,18,0,8,7,9,6,10,5,11,4,12,3,13,2,14,1,15 }; + stbi__zhuffman z_codelength; + stbi_uc lencodes[286+32+137];//padding for maximum single op + stbi_uc codelength_sizes[19]; + int i,n; + + int hlit = stbi__zreceive(a,5) + 257; + int hdist = stbi__zreceive(a,5) + 1; + int hclen = stbi__zreceive(a,4) + 4; + int ntot = hlit + hdist; + + memset(codelength_sizes, 0, sizeof(codelength_sizes)); + for (i=0; i < hclen; ++i) { + int s = stbi__zreceive(a,3); + codelength_sizes[length_dezigzag[i]] = (stbi_uc) s; + } + if (!stbi__zbuild_huffman(&z_codelength, codelength_sizes, 19)) return 0; + + n = 0; + while (n < ntot) { + int c = stbi__zhuffman_decode(a, &z_codelength); + if (c < 0 || c >= 19) return stbi__err("bad codelengths", "Corrupt PNG"); + if (c < 16) + lencodes[n++] = (stbi_uc) c; + else { + stbi_uc fill = 0; + if (c == 16) { + c = stbi__zreceive(a,2)+3; + if (n == 0) return stbi__err("bad codelengths", "Corrupt PNG"); + fill = lencodes[n-1]; + } else if (c == 17) + c = stbi__zreceive(a,3)+3; + else { + STBI_ASSERT(c == 18); + c = stbi__zreceive(a,7)+11; + } + if (ntot - n < c) return stbi__err("bad codelengths", "Corrupt PNG"); + memset(lencodes+n, fill, c); + n += c; + } + } + if (n != ntot) return stbi__err("bad codelengths","Corrupt PNG"); + if (!stbi__zbuild_huffman(&a->z_length, lencodes, hlit)) return 0; + if (!stbi__zbuild_huffman(&a->z_distance, lencodes+hlit, hdist)) return 0; + return 1; +} + +static int stbi__parse_uncompressed_block(stbi__zbuf *a) +{ + stbi_uc header[4]; + int len,nlen,k; + if (a->num_bits & 7) + stbi__zreceive(a, a->num_bits & 7); // discard + // drain the bit-packed data into header + k = 0; + while (a->num_bits > 0) { + header[k++] = (stbi_uc) (a->code_buffer & 255); // suppress MSVC run-time check + a->code_buffer >>= 8; + a->num_bits -= 8; + } + STBI_ASSERT(a->num_bits == 0); + // now fill header the normal way + while (k < 4) + header[k++] = stbi__zget8(a); + len = header[1] * 256 + header[0]; + nlen = header[3] * 256 + header[2]; + if (nlen != (len ^ 0xffff)) return stbi__err("zlib corrupt","Corrupt PNG"); + if (a->zbuffer + len > a->zbuffer_end) return stbi__err("read past buffer","Corrupt PNG"); + if (a->zout + len > a->zout_end) + if (!stbi__zexpand(a, a->zout, len)) return 0; + memcpy(a->zout, a->zbuffer, len); + a->zbuffer += len; + a->zout += len; + return 1; +} + +static int stbi__parse_zlib_header(stbi__zbuf *a) +{ + int cmf = stbi__zget8(a); + int cm = cmf & 15; + /* int cinfo = cmf >> 4; */ + int flg = stbi__zget8(a); + if ((cmf*256+flg) % 31 != 0) return stbi__err("bad zlib header","Corrupt PNG"); // zlib spec + if (flg & 32) return stbi__err("no preset dict","Corrupt PNG"); // preset dictionary not allowed in png + if (cm != 8) return stbi__err("bad compression","Corrupt PNG"); // DEFLATE required for png + // window = 1 << (8 + cinfo)... but who cares, we fully buffer output + return 1; +} + +static const stbi_uc stbi__zdefault_length[288] = +{ + 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, + 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, + 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, + 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, + 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, + 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, + 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, + 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, + 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, 7,7,7,7,7,7,7,7,8,8,8,8,8,8,8,8 +}; +static const stbi_uc stbi__zdefault_distance[32] = +{ + 5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5 +}; +/* +Init algorithm: +{ + int i; // use <= to match clearly with spec + for (i=0; i <= 143; ++i) stbi__zdefault_length[i] = 8; + for ( ; i <= 255; ++i) stbi__zdefault_length[i] = 9; + for ( ; i <= 279; ++i) stbi__zdefault_length[i] = 7; + for ( ; i <= 287; ++i) stbi__zdefault_length[i] = 8; + + for (i=0; i <= 31; ++i) stbi__zdefault_distance[i] = 5; +} +*/ + +static int stbi__parse_zlib(stbi__zbuf *a, int parse_header) +{ + int final, type; + if (parse_header) + if (!stbi__parse_zlib_header(a)) return 0; + a->num_bits = 0; + a->code_buffer = 0; + do { + final = stbi__zreceive(a,1); + type = stbi__zreceive(a,2); + if (type == 0) { + if (!stbi__parse_uncompressed_block(a)) return 0; + } else if (type == 3) { + return 0; + } else { + if (type == 1) { + // use fixed code lengths + if (!stbi__zbuild_huffman(&a->z_length , stbi__zdefault_length , 288)) return 0; + if (!stbi__zbuild_huffman(&a->z_distance, stbi__zdefault_distance, 32)) return 0; + } else { + if (!stbi__compute_huffman_codes(a)) return 0; + } + if (!stbi__parse_huffman_block(a)) return 0; + } + } while (!final); + return 1; +} + +static int stbi__do_zlib(stbi__zbuf *a, char *obuf, int olen, int exp, int parse_header) +{ + a->zout_start = obuf; + a->zout = obuf; + a->zout_end = obuf + olen; + a->z_expandable = exp; + + return stbi__parse_zlib(a, parse_header); +} + +STBIDEF char *stbi_zlib_decode_malloc_guesssize(const char *buffer, int len, int initial_size, int *outlen) +{ + stbi__zbuf a; + char *p = (char *) stbi__malloc(initial_size); + if (p == NULL) return NULL; + a.zbuffer = (stbi_uc *) buffer; + a.zbuffer_end = (stbi_uc *) buffer + len; + if (stbi__do_zlib(&a, p, initial_size, 1, 1)) { + if (outlen) *outlen = (int) (a.zout - a.zout_start); + return a.zout_start; + } else { + STBI_FREE(a.zout_start); + return NULL; + } +} + +STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen) +{ + return stbi_zlib_decode_malloc_guesssize(buffer, len, 16384, outlen); +} + +STBIDEF char *stbi_zlib_decode_malloc_guesssize_headerflag(const char *buffer, int len, int initial_size, int *outlen, int parse_header) +{ + stbi__zbuf a; + char *p = (char *) stbi__malloc(initial_size); + if (p == NULL) return NULL; + a.zbuffer = (stbi_uc *) buffer; + a.zbuffer_end = (stbi_uc *) buffer + len; + if (stbi__do_zlib(&a, p, initial_size, 1, parse_header)) { + if (outlen) *outlen = (int) (a.zout - a.zout_start); + return a.zout_start; + } else { + STBI_FREE(a.zout_start); + return NULL; + } +} + +STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen) +{ + stbi__zbuf a; + a.zbuffer = (stbi_uc *) ibuffer; + a.zbuffer_end = (stbi_uc *) ibuffer + ilen; + if (stbi__do_zlib(&a, obuffer, olen, 0, 1)) + return (int) (a.zout - a.zout_start); + else + return -1; +} + +STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen) +{ + stbi__zbuf a; + char *p = (char *) stbi__malloc(16384); + if (p == NULL) return NULL; + a.zbuffer = (stbi_uc *) buffer; + a.zbuffer_end = (stbi_uc *) buffer+len; + if (stbi__do_zlib(&a, p, 16384, 1, 0)) { + if (outlen) *outlen = (int) (a.zout - a.zout_start); + return a.zout_start; + } else { + STBI_FREE(a.zout_start); + return NULL; + } +} + +STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen) +{ + stbi__zbuf a; + a.zbuffer = (stbi_uc *) ibuffer; + a.zbuffer_end = (stbi_uc *) ibuffer + ilen; + if (stbi__do_zlib(&a, obuffer, olen, 0, 0)) + return (int) (a.zout - a.zout_start); + else + return -1; +} +#endif + +// public domain "baseline" PNG decoder v0.10 Sean Barrett 2006-11-18 +// simple implementation +// - only 8-bit samples +// - no CRC checking +// - allocates lots of intermediate memory +// - avoids problem of streaming data between subsystems +// - avoids explicit window management +// performance +// - uses stb_zlib, a PD zlib implementation with fast huffman decoding + +#ifndef STBI_NO_PNG +typedef struct +{ + stbi__uint32 length; + stbi__uint32 type; +} stbi__pngchunk; + +static stbi__pngchunk stbi__get_chunk_header(stbi__context *s) +{ + stbi__pngchunk c; + c.length = stbi__get32be(s); + c.type = stbi__get32be(s); + return c; +} + +static int stbi__check_png_header(stbi__context *s) +{ + static const stbi_uc png_sig[8] = { 137,80,78,71,13,10,26,10 }; + int i; + for (i=0; i < 8; ++i) + if (stbi__get8(s) != png_sig[i]) return stbi__err("bad png sig","Not a PNG"); + return 1; +} + +typedef struct +{ + stbi__context *s; + stbi_uc *idata, *expanded, *out; + int depth; +} stbi__png; + + +enum { + STBI__F_none=0, + STBI__F_sub=1, + STBI__F_up=2, + STBI__F_avg=3, + STBI__F_paeth=4, + // synthetic filters used for first scanline to avoid needing a dummy row of 0s + STBI__F_avg_first, + STBI__F_paeth_first +}; + +static stbi_uc first_row_filter[5] = +{ + STBI__F_none, + STBI__F_sub, + STBI__F_none, + STBI__F_avg_first, + STBI__F_paeth_first +}; + +static int stbi__paeth(int a, int b, int c) +{ + int p = a + b - c; + int pa = abs(p-a); + int pb = abs(p-b); + int pc = abs(p-c); + if (pa <= pb && pa <= pc) return a; + if (pb <= pc) return b; + return c; +} + +static const stbi_uc stbi__depth_scale_table[9] = { 0, 0xff, 0x55, 0, 0x11, 0,0,0, 0x01 }; + +// create the png data from post-deflated data +static int stbi__create_png_image_raw(stbi__png *a, stbi_uc *raw, stbi__uint32 raw_len, int out_n, stbi__uint32 x, stbi__uint32 y, int depth, int color) +{ + int bytes = (depth == 16? 2 : 1); + stbi__context *s = a->s; + stbi__uint32 i,j,stride = x*out_n*bytes; + stbi__uint32 img_len, img_width_bytes; + int k; + int img_n = s->img_n; // copy it into a local for later + + int output_bytes = out_n*bytes; + int filter_bytes = img_n*bytes; + int width = x; + + STBI_ASSERT(out_n == s->img_n || out_n == s->img_n+1); + a->out = (stbi_uc *) stbi__malloc_mad3(x, y, output_bytes, 0); // extra bytes to write off the end into + if (!a->out) return stbi__err("outofmem", "Out of memory"); + + if (!stbi__mad3sizes_valid(img_n, x, depth, 7)) return stbi__err("too large", "Corrupt PNG"); + img_width_bytes = (((img_n * x * depth) + 7) >> 3); + img_len = (img_width_bytes + 1) * y; + + // we used to check for exact match between raw_len and img_len on non-interlaced PNGs, + // but issue #276 reported a PNG in the wild that had extra data at the end (all zeros), + // so just check for raw_len < img_len always. + if (raw_len < img_len) return stbi__err("not enough pixels","Corrupt PNG"); + + for (j=0; j < y; ++j) { + stbi_uc *cur = a->out + stride*j; + stbi_uc *prior; + int filter = *raw++; + + if (filter > 4) + return stbi__err("invalid filter","Corrupt PNG"); + + if (depth < 8) { + STBI_ASSERT(img_width_bytes <= x); + cur += x*out_n - img_width_bytes; // store output to the rightmost img_len bytes, so we can decode in place + filter_bytes = 1; + width = img_width_bytes; + } + prior = cur - stride; // bugfix: need to compute this after 'cur +=' computation above + + // if first row, use special filter that doesn't sample previous row + if (j == 0) filter = first_row_filter[filter]; + + // handle first byte explicitly + for (k=0; k < filter_bytes; ++k) { + switch (filter) { + case STBI__F_none : cur[k] = raw[k]; break; + case STBI__F_sub : cur[k] = raw[k]; break; + case STBI__F_up : cur[k] = STBI__BYTECAST(raw[k] + prior[k]); break; + case STBI__F_avg : cur[k] = STBI__BYTECAST(raw[k] + (prior[k]>>1)); break; + case STBI__F_paeth : cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(0,prior[k],0)); break; + case STBI__F_avg_first : cur[k] = raw[k]; break; + case STBI__F_paeth_first: cur[k] = raw[k]; break; + } + } + + if (depth == 8) { + if (img_n != out_n) + cur[img_n] = 255; // first pixel + raw += img_n; + cur += out_n; + prior += out_n; + } else if (depth == 16) { + if (img_n != out_n) { + cur[filter_bytes] = 255; // first pixel top byte + cur[filter_bytes+1] = 255; // first pixel bottom byte + } + raw += filter_bytes; + cur += output_bytes; + prior += output_bytes; + } else { + raw += 1; + cur += 1; + prior += 1; + } + + // this is a little gross, so that we don't switch per-pixel or per-component + if (depth < 8 || img_n == out_n) { + int nk = (width - 1)*filter_bytes; + #define STBI__CASE(f) \ + case f: \ + for (k=0; k < nk; ++k) + switch (filter) { + // "none" filter turns into a memcpy here; make that explicit. + case STBI__F_none: memcpy(cur, raw, nk); break; + STBI__CASE(STBI__F_sub) { cur[k] = STBI__BYTECAST(raw[k] + cur[k-filter_bytes]); } break; + STBI__CASE(STBI__F_up) { cur[k] = STBI__BYTECAST(raw[k] + prior[k]); } break; + STBI__CASE(STBI__F_avg) { cur[k] = STBI__BYTECAST(raw[k] + ((prior[k] + cur[k-filter_bytes])>>1)); } break; + STBI__CASE(STBI__F_paeth) { cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k-filter_bytes],prior[k],prior[k-filter_bytes])); } break; + STBI__CASE(STBI__F_avg_first) { cur[k] = STBI__BYTECAST(raw[k] + (cur[k-filter_bytes] >> 1)); } break; + STBI__CASE(STBI__F_paeth_first) { cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k-filter_bytes],0,0)); } break; + } + #undef STBI__CASE + raw += nk; + } else { + STBI_ASSERT(img_n+1 == out_n); + #define STBI__CASE(f) \ + case f: \ + for (i=x-1; i >= 1; --i, cur[filter_bytes]=255,raw+=filter_bytes,cur+=output_bytes,prior+=output_bytes) \ + for (k=0; k < filter_bytes; ++k) + switch (filter) { + STBI__CASE(STBI__F_none) { cur[k] = raw[k]; } break; + STBI__CASE(STBI__F_sub) { cur[k] = STBI__BYTECAST(raw[k] + cur[k- output_bytes]); } break; + STBI__CASE(STBI__F_up) { cur[k] = STBI__BYTECAST(raw[k] + prior[k]); } break; + STBI__CASE(STBI__F_avg) { cur[k] = STBI__BYTECAST(raw[k] + ((prior[k] + cur[k- output_bytes])>>1)); } break; + STBI__CASE(STBI__F_paeth) { cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k- output_bytes],prior[k],prior[k- output_bytes])); } break; + STBI__CASE(STBI__F_avg_first) { cur[k] = STBI__BYTECAST(raw[k] + (cur[k- output_bytes] >> 1)); } break; + STBI__CASE(STBI__F_paeth_first) { cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k- output_bytes],0,0)); } break; + } + #undef STBI__CASE + + // the loop above sets the high byte of the pixels' alpha, but for + // 16 bit png files we also need the low byte set. we'll do that here. + if (depth == 16) { + cur = a->out + stride*j; // start at the beginning of the row again + for (i=0; i < x; ++i,cur+=output_bytes) { + cur[filter_bytes+1] = 255; + } + } + } + } + + // we make a separate pass to expand bits to pixels; for performance, + // this could run two scanlines behind the above code, so it won't + // intefere with filtering but will still be in the cache. + if (depth < 8) { + for (j=0; j < y; ++j) { + stbi_uc *cur = a->out + stride*j; + stbi_uc *in = a->out + stride*j + x*out_n - img_width_bytes; + // unpack 1/2/4-bit into a 8-bit buffer. allows us to keep the common 8-bit path optimal at minimal cost for 1/2/4-bit + // png guarante byte alignment, if width is not multiple of 8/4/2 we'll decode dummy trailing data that will be skipped in the later loop + stbi_uc scale = (color == 0) ? stbi__depth_scale_table[depth] : 1; // scale grayscale values to 0..255 range + + // note that the final byte might overshoot and write more data than desired. + // we can allocate enough data that this never writes out of memory, but it + // could also overwrite the next scanline. can it overwrite non-empty data + // on the next scanline? yes, consider 1-pixel-wide scanlines with 1-bit-per-pixel. + // so we need to explicitly clamp the final ones + + if (depth == 4) { + for (k=x*img_n; k >= 2; k-=2, ++in) { + *cur++ = scale * ((*in >> 4) ); + *cur++ = scale * ((*in ) & 0x0f); + } + if (k > 0) *cur++ = scale * ((*in >> 4) ); + } else if (depth == 2) { + for (k=x*img_n; k >= 4; k-=4, ++in) { + *cur++ = scale * ((*in >> 6) ); + *cur++ = scale * ((*in >> 4) & 0x03); + *cur++ = scale * ((*in >> 2) & 0x03); + *cur++ = scale * ((*in ) & 0x03); + } + if (k > 0) *cur++ = scale * ((*in >> 6) ); + if (k > 1) *cur++ = scale * ((*in >> 4) & 0x03); + if (k > 2) *cur++ = scale * ((*in >> 2) & 0x03); + } else if (depth == 1) { + for (k=x*img_n; k >= 8; k-=8, ++in) { + *cur++ = scale * ((*in >> 7) ); + *cur++ = scale * ((*in >> 6) & 0x01); + *cur++ = scale * ((*in >> 5) & 0x01); + *cur++ = scale * ((*in >> 4) & 0x01); + *cur++ = scale * ((*in >> 3) & 0x01); + *cur++ = scale * ((*in >> 2) & 0x01); + *cur++ = scale * ((*in >> 1) & 0x01); + *cur++ = scale * ((*in ) & 0x01); + } + if (k > 0) *cur++ = scale * ((*in >> 7) ); + if (k > 1) *cur++ = scale * ((*in >> 6) & 0x01); + if (k > 2) *cur++ = scale * ((*in >> 5) & 0x01); + if (k > 3) *cur++ = scale * ((*in >> 4) & 0x01); + if (k > 4) *cur++ = scale * ((*in >> 3) & 0x01); + if (k > 5) *cur++ = scale * ((*in >> 2) & 0x01); + if (k > 6) *cur++ = scale * ((*in >> 1) & 0x01); + } + if (img_n != out_n) { + int q; + // insert alpha = 255 + cur = a->out + stride*j; + if (img_n == 1) { + for (q=x-1; q >= 0; --q) { + cur[q*2+1] = 255; + cur[q*2+0] = cur[q]; + } + } else { + STBI_ASSERT(img_n == 3); + for (q=x-1; q >= 0; --q) { + cur[q*4+3] = 255; + cur[q*4+2] = cur[q*3+2]; + cur[q*4+1] = cur[q*3+1]; + cur[q*4+0] = cur[q*3+0]; + } + } + } + } + } else if (depth == 16) { + // force the image data from big-endian to platform-native. + // this is done in a separate pass due to the decoding relying + // on the data being untouched, but could probably be done + // per-line during decode if care is taken. + stbi_uc *cur = a->out; + stbi__uint16 *cur16 = (stbi__uint16*)cur; + + for(i=0; i < x*y*out_n; ++i,cur16++,cur+=2) { + *cur16 = (cur[0] << 8) | cur[1]; + } + } + + return 1; +} + +static int stbi__create_png_image(stbi__png *a, stbi_uc *image_data, stbi__uint32 image_data_len, int out_n, int depth, int color, int interlaced) +{ + int bytes = (depth == 16 ? 2 : 1); + int out_bytes = out_n * bytes; + stbi_uc *final; + int p; + if (!interlaced) + return stbi__create_png_image_raw(a, image_data, image_data_len, out_n, a->s->img_x, a->s->img_y, depth, color); + + // de-interlacing + final = (stbi_uc *) stbi__malloc_mad3(a->s->img_x, a->s->img_y, out_bytes, 0); + for (p=0; p < 7; ++p) { + int xorig[] = { 0,4,0,2,0,1,0 }; + int yorig[] = { 0,0,4,0,2,0,1 }; + int xspc[] = { 8,8,4,4,2,2,1 }; + int yspc[] = { 8,8,8,4,4,2,2 }; + int i,j,x,y; + // pass1_x[4] = 0, pass1_x[5] = 1, pass1_x[12] = 1 + x = (a->s->img_x - xorig[p] + xspc[p]-1) / xspc[p]; + y = (a->s->img_y - yorig[p] + yspc[p]-1) / yspc[p]; + if (x && y) { + stbi__uint32 img_len = ((((a->s->img_n * x * depth) + 7) >> 3) + 1) * y; + if (!stbi__create_png_image_raw(a, image_data, image_data_len, out_n, x, y, depth, color)) { + STBI_FREE(final); + return 0; + } + for (j=0; j < y; ++j) { + for (i=0; i < x; ++i) { + int out_y = j*yspc[p]+yorig[p]; + int out_x = i*xspc[p]+xorig[p]; + memcpy(final + out_y*a->s->img_x*out_bytes + out_x*out_bytes, + a->out + (j*x+i)*out_bytes, out_bytes); + } + } + STBI_FREE(a->out); + image_data += img_len; + image_data_len -= img_len; + } + } + a->out = final; + + return 1; +} + +static int stbi__compute_transparency(stbi__png *z, stbi_uc tc[3], int out_n) +{ + stbi__context *s = z->s; + stbi__uint32 i, pixel_count = s->img_x * s->img_y; + stbi_uc *p = z->out; + + // compute color-based transparency, assuming we've + // already got 255 as the alpha value in the output + STBI_ASSERT(out_n == 2 || out_n == 4); + + if (out_n == 2) { + for (i=0; i < pixel_count; ++i) { + p[1] = (p[0] == tc[0] ? 0 : 255); + p += 2; + } + } else { + for (i=0; i < pixel_count; ++i) { + if (p[0] == tc[0] && p[1] == tc[1] && p[2] == tc[2]) + p[3] = 0; + p += 4; + } + } + return 1; +} + +static int stbi__compute_transparency16(stbi__png *z, stbi__uint16 tc[3], int out_n) +{ + stbi__context *s = z->s; + stbi__uint32 i, pixel_count = s->img_x * s->img_y; + stbi__uint16 *p = (stbi__uint16*) z->out; + + // compute color-based transparency, assuming we've + // already got 65535 as the alpha value in the output + STBI_ASSERT(out_n == 2 || out_n == 4); + + if (out_n == 2) { + for (i = 0; i < pixel_count; ++i) { + p[1] = (p[0] == tc[0] ? 0 : 65535); + p += 2; + } + } else { + for (i = 0; i < pixel_count; ++i) { + if (p[0] == tc[0] && p[1] == tc[1] && p[2] == tc[2]) + p[3] = 0; + p += 4; + } + } + return 1; +} + +static int stbi__expand_png_palette(stbi__png *a, stbi_uc *palette, int len, int pal_img_n) +{ + stbi__uint32 i, pixel_count = a->s->img_x * a->s->img_y; + stbi_uc *p, *temp_out, *orig = a->out; + + p = (stbi_uc *) stbi__malloc_mad2(pixel_count, pal_img_n, 0); + if (p == NULL) return stbi__err("outofmem", "Out of memory"); + + // between here and free(out) below, exitting would leak + temp_out = p; + + if (pal_img_n == 3) { + for (i=0; i < pixel_count; ++i) { + int n = orig[i]*4; + p[0] = palette[n ]; + p[1] = palette[n+1]; + p[2] = palette[n+2]; + p += 3; + } + } else { + for (i=0; i < pixel_count; ++i) { + int n = orig[i]*4; + p[0] = palette[n ]; + p[1] = palette[n+1]; + p[2] = palette[n+2]; + p[3] = palette[n+3]; + p += 4; + } + } + STBI_FREE(a->out); + a->out = temp_out; + + STBI_NOTUSED(len); + + return 1; +} + +static int stbi__unpremultiply_on_load = 0; +static int stbi__de_iphone_flag = 0; + +STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply) +{ + stbi__unpremultiply_on_load = flag_true_if_should_unpremultiply; +} + +STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert) +{ + stbi__de_iphone_flag = flag_true_if_should_convert; +} + +static void stbi__de_iphone(stbi__png *z) +{ + stbi__context *s = z->s; + stbi__uint32 i, pixel_count = s->img_x * s->img_y; + stbi_uc *p = z->out; + + if (s->img_out_n == 3) { // convert bgr to rgb + for (i=0; i < pixel_count; ++i) { + stbi_uc t = p[0]; + p[0] = p[2]; + p[2] = t; + p += 3; + } + } else { + STBI_ASSERT(s->img_out_n == 4); + if (stbi__unpremultiply_on_load) { + // convert bgr to rgb and unpremultiply + for (i=0; i < pixel_count; ++i) { + stbi_uc a = p[3]; + stbi_uc t = p[0]; + if (a) { + stbi_uc half = a / 2; + p[0] = (p[2] * 255 + half) / a; + p[1] = (p[1] * 255 + half) / a; + p[2] = ( t * 255 + half) / a; + } else { + p[0] = p[2]; + p[2] = t; + } + p += 4; + } + } else { + // convert bgr to rgb + for (i=0; i < pixel_count; ++i) { + stbi_uc t = p[0]; + p[0] = p[2]; + p[2] = t; + p += 4; + } + } + } +} + +#define STBI__PNG_TYPE(a,b,c,d) (((unsigned) (a) << 24) + ((unsigned) (b) << 16) + ((unsigned) (c) << 8) + (unsigned) (d)) + +static int stbi__parse_png_file(stbi__png *z, int scan, int req_comp) +{ + stbi_uc palette[1024], pal_img_n=0; + stbi_uc has_trans=0, tc[3]={0}; + stbi__uint16 tc16[3]; + stbi__uint32 ioff=0, idata_limit=0, i, pal_len=0; + int first=1,k,interlace=0, color=0, is_iphone=0; + stbi__context *s = z->s; + + z->expanded = NULL; + z->idata = NULL; + z->out = NULL; + + if (!stbi__check_png_header(s)) return 0; + + if (scan == STBI__SCAN_type) return 1; + + for (;;) { + stbi__pngchunk c = stbi__get_chunk_header(s); + switch (c.type) { + case STBI__PNG_TYPE('C','g','B','I'): + is_iphone = 1; + stbi__skip(s, c.length); + break; + case STBI__PNG_TYPE('I','H','D','R'): { + int comp,filter; + if (!first) return stbi__err("multiple IHDR","Corrupt PNG"); + first = 0; + if (c.length != 13) return stbi__err("bad IHDR len","Corrupt PNG"); + s->img_x = stbi__get32be(s); if (s->img_x > (1 << 24)) return stbi__err("too large","Very large image (corrupt?)"); + s->img_y = stbi__get32be(s); if (s->img_y > (1 << 24)) return stbi__err("too large","Very large image (corrupt?)"); + z->depth = stbi__get8(s); if (z->depth != 1 && z->depth != 2 && z->depth != 4 && z->depth != 8 && z->depth != 16) return stbi__err("1/2/4/8/16-bit only","PNG not supported: 1/2/4/8/16-bit only"); + color = stbi__get8(s); if (color > 6) return stbi__err("bad ctype","Corrupt PNG"); + if (color == 3 && z->depth == 16) return stbi__err("bad ctype","Corrupt PNG"); + if (color == 3) pal_img_n = 3; else if (color & 1) return stbi__err("bad ctype","Corrupt PNG"); + comp = stbi__get8(s); if (comp) return stbi__err("bad comp method","Corrupt PNG"); + filter= stbi__get8(s); if (filter) return stbi__err("bad filter method","Corrupt PNG"); + interlace = stbi__get8(s); if (interlace>1) return stbi__err("bad interlace method","Corrupt PNG"); + if (!s->img_x || !s->img_y) return stbi__err("0-pixel image","Corrupt PNG"); + if (!pal_img_n) { + s->img_n = (color & 2 ? 3 : 1) + (color & 4 ? 1 : 0); + if ((1 << 30) / s->img_x / s->img_n < s->img_y) return stbi__err("too large", "Image too large to decode"); + if (scan == STBI__SCAN_header) return 1; + } else { + // if paletted, then pal_n is our final components, and + // img_n is # components to decompress/filter. + s->img_n = 1; + if ((1 << 30) / s->img_x / 4 < s->img_y) return stbi__err("too large","Corrupt PNG"); + // if SCAN_header, have to scan to see if we have a tRNS + } + break; + } + + case STBI__PNG_TYPE('P','L','T','E'): { + if (first) return stbi__err("first not IHDR", "Corrupt PNG"); + if (c.length > 256*3) return stbi__err("invalid PLTE","Corrupt PNG"); + pal_len = c.length / 3; + if (pal_len * 3 != c.length) return stbi__err("invalid PLTE","Corrupt PNG"); + for (i=0; i < pal_len; ++i) { + palette[i*4+0] = stbi__get8(s); + palette[i*4+1] = stbi__get8(s); + palette[i*4+2] = stbi__get8(s); + palette[i*4+3] = 255; + } + break; + } + + case STBI__PNG_TYPE('t','R','N','S'): { + if (first) return stbi__err("first not IHDR", "Corrupt PNG"); + if (z->idata) return stbi__err("tRNS after IDAT","Corrupt PNG"); + if (pal_img_n) { + if (scan == STBI__SCAN_header) { s->img_n = 4; return 1; } + if (pal_len == 0) return stbi__err("tRNS before PLTE","Corrupt PNG"); + if (c.length > pal_len) return stbi__err("bad tRNS len","Corrupt PNG"); + pal_img_n = 4; + for (i=0; i < c.length; ++i) + palette[i*4+3] = stbi__get8(s); + } else { + if (!(s->img_n & 1)) return stbi__err("tRNS with alpha","Corrupt PNG"); + if (c.length != (stbi__uint32) s->img_n*2) return stbi__err("bad tRNS len","Corrupt PNG"); + has_trans = 1; + if (z->depth == 16) { + for (k = 0; k < s->img_n; ++k) tc16[k] = (stbi__uint16)stbi__get16be(s); // copy the values as-is + } else { + for (k = 0; k < s->img_n; ++k) tc[k] = (stbi_uc)(stbi__get16be(s) & 255) * stbi__depth_scale_table[z->depth]; // non 8-bit images will be larger + } + } + break; + } + + case STBI__PNG_TYPE('I','D','A','T'): { + if (first) return stbi__err("first not IHDR", "Corrupt PNG"); + if (pal_img_n && !pal_len) return stbi__err("no PLTE","Corrupt PNG"); + if (scan == STBI__SCAN_header) { s->img_n = pal_img_n; return 1; } + if ((int)(ioff + c.length) < (int)ioff) return 0; + if (ioff + c.length > idata_limit) { + stbi__uint32 idata_limit_old = idata_limit; + stbi_uc *p; + if (idata_limit == 0) idata_limit = c.length > 4096 ? c.length : 4096; + while (ioff + c.length > idata_limit) + idata_limit *= 2; + STBI_NOTUSED(idata_limit_old); + p = (stbi_uc *) STBI_REALLOC_SIZED(z->idata, idata_limit_old, idata_limit); if (p == NULL) return stbi__err("outofmem", "Out of memory"); + z->idata = p; + } + if (!stbi__getn(s, z->idata+ioff,c.length)) return stbi__err("outofdata","Corrupt PNG"); + ioff += c.length; + break; + } + + case STBI__PNG_TYPE('I','E','N','D'): { + stbi__uint32 raw_len, bpl; + if (first) return stbi__err("first not IHDR", "Corrupt PNG"); + if (scan != STBI__SCAN_load) return 1; + if (z->idata == NULL) return stbi__err("no IDAT","Corrupt PNG"); + // initial guess for decoded data size to avoid unnecessary reallocs + bpl = (s->img_x * z->depth + 7) / 8; // bytes per line, per component + raw_len = bpl * s->img_y * s->img_n /* pixels */ + s->img_y /* filter mode per row */; + z->expanded = (stbi_uc *) stbi_zlib_decode_malloc_guesssize_headerflag((char *) z->idata, ioff, raw_len, (int *) &raw_len, !is_iphone); + if (z->expanded == NULL) return 0; // zlib should set error + STBI_FREE(z->idata); z->idata = NULL; + if ((req_comp == s->img_n+1 && req_comp != 3 && !pal_img_n) || has_trans) + s->img_out_n = s->img_n+1; + else + s->img_out_n = s->img_n; + if (!stbi__create_png_image(z, z->expanded, raw_len, s->img_out_n, z->depth, color, interlace)) return 0; + if (has_trans) { + if (z->depth == 16) { + if (!stbi__compute_transparency16(z, tc16, s->img_out_n)) return 0; + } else { + if (!stbi__compute_transparency(z, tc, s->img_out_n)) return 0; + } + } + if (is_iphone && stbi__de_iphone_flag && s->img_out_n > 2) + stbi__de_iphone(z); + if (pal_img_n) { + // pal_img_n == 3 or 4 + s->img_n = pal_img_n; // record the actual colors we had + s->img_out_n = pal_img_n; + if (req_comp >= 3) s->img_out_n = req_comp; + if (!stbi__expand_png_palette(z, palette, pal_len, s->img_out_n)) + return 0; + } else if (has_trans) { + // non-paletted image with tRNS -> source image has (constant) alpha + ++s->img_n; + } + STBI_FREE(z->expanded); z->expanded = NULL; + return 1; + } + + default: + // if critical, fail + if (first) return stbi__err("first not IHDR", "Corrupt PNG"); + if ((c.type & (1 << 29)) == 0) { + #ifndef STBI_NO_FAILURE_STRINGS + // not threadsafe + static char invalid_chunk[] = "XXXX PNG chunk not known"; + invalid_chunk[0] = STBI__BYTECAST(c.type >> 24); + invalid_chunk[1] = STBI__BYTECAST(c.type >> 16); + invalid_chunk[2] = STBI__BYTECAST(c.type >> 8); + invalid_chunk[3] = STBI__BYTECAST(c.type >> 0); + #endif + return stbi__err(invalid_chunk, "PNG not supported: unknown PNG chunk type"); + } + stbi__skip(s, c.length); + break; + } + // end of PNG chunk, read and skip CRC + stbi__get32be(s); + } +} + +static void *stbi__do_png(stbi__png *p, int *x, int *y, int *n, int req_comp, stbi__result_info *ri) +{ + void *result=NULL; + if (req_comp < 0 || req_comp > 4) return stbi__errpuc("bad req_comp", "Internal error"); + if (stbi__parse_png_file(p, STBI__SCAN_load, req_comp)) { + if (p->depth < 8) + ri->bits_per_channel = 8; + else + ri->bits_per_channel = p->depth; + result = p->out; + p->out = NULL; + if (req_comp && req_comp != p->s->img_out_n) { + if (ri->bits_per_channel == 8) + result = stbi__convert_format((unsigned char *) result, p->s->img_out_n, req_comp, p->s->img_x, p->s->img_y); + else + result = stbi__convert_format16((stbi__uint16 *) result, p->s->img_out_n, req_comp, p->s->img_x, p->s->img_y); + p->s->img_out_n = req_comp; + if (result == NULL) return result; + } + *x = p->s->img_x; + *y = p->s->img_y; + if (n) *n = p->s->img_n; + } + STBI_FREE(p->out); p->out = NULL; + STBI_FREE(p->expanded); p->expanded = NULL; + STBI_FREE(p->idata); p->idata = NULL; + + return result; +} + +static void *stbi__png_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri) +{ + stbi__png p; + p.s = s; + return stbi__do_png(&p, x,y,comp,req_comp, ri); +} + +static int stbi__png_test(stbi__context *s) +{ + int r; + r = stbi__check_png_header(s); + stbi__rewind(s); + return r; +} + +static int stbi__png_info_raw(stbi__png *p, int *x, int *y, int *comp) +{ + if (!stbi__parse_png_file(p, STBI__SCAN_header, 0)) { + stbi__rewind( p->s ); + return 0; + } + if (x) *x = p->s->img_x; + if (y) *y = p->s->img_y; + if (comp) *comp = p->s->img_n; + return 1; +} + +static int stbi__png_info(stbi__context *s, int *x, int *y, int *comp) +{ + stbi__png p; + p.s = s; + return stbi__png_info_raw(&p, x, y, comp); +} + +static int stbi__png_is16(stbi__context *s) +{ + stbi__png p; + p.s = s; + if (!stbi__png_info_raw(&p, NULL, NULL, NULL)) + return 0; + if (p.depth != 16) { + stbi__rewind(p.s); + return 0; + } + return 1; +} +#endif + +// Microsoft/Windows BMP image + +#ifndef STBI_NO_BMP +static int stbi__bmp_test_raw(stbi__context *s) +{ + int r; + int sz; + if (stbi__get8(s) != 'B') return 0; + if (stbi__get8(s) != 'M') return 0; + stbi__get32le(s); // discard filesize + stbi__get16le(s); // discard reserved + stbi__get16le(s); // discard reserved + stbi__get32le(s); // discard data offset + sz = stbi__get32le(s); + r = (sz == 12 || sz == 40 || sz == 56 || sz == 108 || sz == 124); + return r; +} + +static int stbi__bmp_test(stbi__context *s) +{ + int r = stbi__bmp_test_raw(s); + stbi__rewind(s); + return r; +} + + +// returns 0..31 for the highest set bit +static int stbi__high_bit(unsigned int z) +{ + int n=0; + if (z == 0) return -1; + if (z >= 0x10000) { n += 16; z >>= 16; } + if (z >= 0x00100) { n += 8; z >>= 8; } + if (z >= 0x00010) { n += 4; z >>= 4; } + if (z >= 0x00004) { n += 2; z >>= 2; } + if (z >= 0x00002) { n += 1; z >>= 1; } + return n; +} + +static int stbi__bitcount(unsigned int a) +{ + a = (a & 0x55555555) + ((a >> 1) & 0x55555555); // max 2 + a = (a & 0x33333333) + ((a >> 2) & 0x33333333); // max 4 + a = (a + (a >> 4)) & 0x0f0f0f0f; // max 8 per 4, now 8 bits + a = (a + (a >> 8)); // max 16 per 8 bits + a = (a + (a >> 16)); // max 32 per 8 bits + return a & 0xff; +} + +// extract an arbitrarily-aligned N-bit value (N=bits) +// from v, and then make it 8-bits long and fractionally +// extend it to full full range. +static int stbi__shiftsigned(unsigned int v, int shift, int bits) +{ + static unsigned int mul_table[9] = { + 0, + 0xff/*0b11111111*/, 0x55/*0b01010101*/, 0x49/*0b01001001*/, 0x11/*0b00010001*/, + 0x21/*0b00100001*/, 0x41/*0b01000001*/, 0x81/*0b10000001*/, 0x01/*0b00000001*/, + }; + static unsigned int shift_table[9] = { + 0, 0,0,1,0,2,4,6,0, + }; + if (shift < 0) + v <<= -shift; + else + v >>= shift; + STBI_ASSERT(v >= 0 && v < 256); + v >>= (8-bits); + STBI_ASSERT(bits >= 0 && bits <= 8); + return (int) ((unsigned) v * mul_table[bits]) >> shift_table[bits]; +} + +typedef struct +{ + int bpp, offset, hsz; + unsigned int mr,mg,mb,ma, all_a; +} stbi__bmp_data; + +static void *stbi__bmp_parse_header(stbi__context *s, stbi__bmp_data *info) +{ + int hsz; + if (stbi__get8(s) != 'B' || stbi__get8(s) != 'M') return stbi__errpuc("not BMP", "Corrupt BMP"); + stbi__get32le(s); // discard filesize + stbi__get16le(s); // discard reserved + stbi__get16le(s); // discard reserved + info->offset = stbi__get32le(s); + info->hsz = hsz = stbi__get32le(s); + info->mr = info->mg = info->mb = info->ma = 0; + + if (hsz != 12 && hsz != 40 && hsz != 56 && hsz != 108 && hsz != 124) return stbi__errpuc("unknown BMP", "BMP type not supported: unknown"); + if (hsz == 12) { + s->img_x = stbi__get16le(s); + s->img_y = stbi__get16le(s); + } else { + s->img_x = stbi__get32le(s); + s->img_y = stbi__get32le(s); + } + if (stbi__get16le(s) != 1) return stbi__errpuc("bad BMP", "bad BMP"); + info->bpp = stbi__get16le(s); + if (hsz != 12) { + int compress = stbi__get32le(s); + if (compress == 1 || compress == 2) return stbi__errpuc("BMP RLE", "BMP type not supported: RLE"); + stbi__get32le(s); // discard sizeof + stbi__get32le(s); // discard hres + stbi__get32le(s); // discard vres + stbi__get32le(s); // discard colorsused + stbi__get32le(s); // discard max important + if (hsz == 40 || hsz == 56) { + if (hsz == 56) { + stbi__get32le(s); + stbi__get32le(s); + stbi__get32le(s); + stbi__get32le(s); + } + if (info->bpp == 16 || info->bpp == 32) { + if (compress == 0) { + if (info->bpp == 32) { + info->mr = 0xffu << 16; + info->mg = 0xffu << 8; + info->mb = 0xffu << 0; + info->ma = 0xffu << 24; + info->all_a = 0; // if all_a is 0 at end, then we loaded alpha channel but it was all 0 + } else { + info->mr = 31u << 10; + info->mg = 31u << 5; + info->mb = 31u << 0; + } + } else if (compress == 3) { + info->mr = stbi__get32le(s); + info->mg = stbi__get32le(s); + info->mb = stbi__get32le(s); + // not documented, but generated by photoshop and handled by mspaint + if (info->mr == info->mg && info->mg == info->mb) { + // ?!?!? + return stbi__errpuc("bad BMP", "bad BMP"); + } + } else + return stbi__errpuc("bad BMP", "bad BMP"); + } + } else { + int i; + if (hsz != 108 && hsz != 124) + return stbi__errpuc("bad BMP", "bad BMP"); + info->mr = stbi__get32le(s); + info->mg = stbi__get32le(s); + info->mb = stbi__get32le(s); + info->ma = stbi__get32le(s); + stbi__get32le(s); // discard color space + for (i=0; i < 12; ++i) + stbi__get32le(s); // discard color space parameters + if (hsz == 124) { + stbi__get32le(s); // discard rendering intent + stbi__get32le(s); // discard offset of profile data + stbi__get32le(s); // discard size of profile data + stbi__get32le(s); // discard reserved + } + } + } + return (void *) 1; +} + + +static void *stbi__bmp_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri) +{ + stbi_uc *out; + unsigned int mr=0,mg=0,mb=0,ma=0, all_a; + stbi_uc pal[256][4]; + int psize=0,i,j,width; + int flip_vertically, pad, target; + stbi__bmp_data info; + STBI_NOTUSED(ri); + + info.all_a = 255; + if (stbi__bmp_parse_header(s, &info) == NULL) + return NULL; // error code already set + + flip_vertically = ((int) s->img_y) > 0; + s->img_y = abs((int) s->img_y); + + mr = info.mr; + mg = info.mg; + mb = info.mb; + ma = info.ma; + all_a = info.all_a; + + if (info.hsz == 12) { + if (info.bpp < 24) + psize = (info.offset - 14 - 24) / 3; + } else { + if (info.bpp < 16) + psize = (info.offset - 14 - info.hsz) >> 2; + } + + s->img_n = ma ? 4 : 3; + if (req_comp && req_comp >= 3) // we can directly decode 3 or 4 + target = req_comp; + else + target = s->img_n; // if they want monochrome, we'll post-convert + + // sanity-check size + if (!stbi__mad3sizes_valid(target, s->img_x, s->img_y, 0)) + return stbi__errpuc("too large", "Corrupt BMP"); + + out = (stbi_uc *) stbi__malloc_mad3(target, s->img_x, s->img_y, 0); + if (!out) return stbi__errpuc("outofmem", "Out of memory"); + if (info.bpp < 16) { + int z=0; + if (psize == 0 || psize > 256) { STBI_FREE(out); return stbi__errpuc("invalid", "Corrupt BMP"); } + for (i=0; i < psize; ++i) { + pal[i][2] = stbi__get8(s); + pal[i][1] = stbi__get8(s); + pal[i][0] = stbi__get8(s); + if (info.hsz != 12) stbi__get8(s); + pal[i][3] = 255; + } + stbi__skip(s, info.offset - 14 - info.hsz - psize * (info.hsz == 12 ? 3 : 4)); + if (info.bpp == 1) width = (s->img_x + 7) >> 3; + else if (info.bpp == 4) width = (s->img_x + 1) >> 1; + else if (info.bpp == 8) width = s->img_x; + else { STBI_FREE(out); return stbi__errpuc("bad bpp", "Corrupt BMP"); } + pad = (-width)&3; + if (info.bpp == 1) { + for (j=0; j < (int) s->img_y; ++j) { + int bit_offset = 7, v = stbi__get8(s); + for (i=0; i < (int) s->img_x; ++i) { + int color = (v>>bit_offset)&0x1; + out[z++] = pal[color][0]; + out[z++] = pal[color][1]; + out[z++] = pal[color][2]; + if (target == 4) out[z++] = 255; + if (i+1 == (int) s->img_x) break; + if((--bit_offset) < 0) { + bit_offset = 7; + v = stbi__get8(s); + } + } + stbi__skip(s, pad); + } + } else { + for (j=0; j < (int) s->img_y; ++j) { + for (i=0; i < (int) s->img_x; i += 2) { + int v=stbi__get8(s),v2=0; + if (info.bpp == 4) { + v2 = v & 15; + v >>= 4; + } + out[z++] = pal[v][0]; + out[z++] = pal[v][1]; + out[z++] = pal[v][2]; + if (target == 4) out[z++] = 255; + if (i+1 == (int) s->img_x) break; + v = (info.bpp == 8) ? stbi__get8(s) : v2; + out[z++] = pal[v][0]; + out[z++] = pal[v][1]; + out[z++] = pal[v][2]; + if (target == 4) out[z++] = 255; + } + stbi__skip(s, pad); + } + } + } else { + int rshift=0,gshift=0,bshift=0,ashift=0,rcount=0,gcount=0,bcount=0,acount=0; + int z = 0; + int easy=0; + stbi__skip(s, info.offset - 14 - info.hsz); + if (info.bpp == 24) width = 3 * s->img_x; + else if (info.bpp == 16) width = 2*s->img_x; + else /* bpp = 32 and pad = 0 */ width=0; + pad = (-width) & 3; + if (info.bpp == 24) { + easy = 1; + } else if (info.bpp == 32) { + if (mb == 0xff && mg == 0xff00 && mr == 0x00ff0000 && ma == 0xff000000) + easy = 2; + } + if (!easy) { + if (!mr || !mg || !mb) { STBI_FREE(out); return stbi__errpuc("bad masks", "Corrupt BMP"); } + // right shift amt to put high bit in position #7 + rshift = stbi__high_bit(mr)-7; rcount = stbi__bitcount(mr); + gshift = stbi__high_bit(mg)-7; gcount = stbi__bitcount(mg); + bshift = stbi__high_bit(mb)-7; bcount = stbi__bitcount(mb); + ashift = stbi__high_bit(ma)-7; acount = stbi__bitcount(ma); + } + for (j=0; j < (int) s->img_y; ++j) { + if (easy) { + for (i=0; i < (int) s->img_x; ++i) { + unsigned char a; + out[z+2] = stbi__get8(s); + out[z+1] = stbi__get8(s); + out[z+0] = stbi__get8(s); + z += 3; + a = (easy == 2 ? stbi__get8(s) : 255); + all_a |= a; + if (target == 4) out[z++] = a; + } + } else { + int bpp = info.bpp; + for (i=0; i < (int) s->img_x; ++i) { + stbi__uint32 v = (bpp == 16 ? (stbi__uint32) stbi__get16le(s) : stbi__get32le(s)); + unsigned int a; + out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mr, rshift, rcount)); + out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mg, gshift, gcount)); + out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mb, bshift, bcount)); + a = (ma ? stbi__shiftsigned(v & ma, ashift, acount) : 255); + all_a |= a; + if (target == 4) out[z++] = STBI__BYTECAST(a); + } + } + stbi__skip(s, pad); + } + } + + // if alpha channel is all 0s, replace with all 255s + if (target == 4 && all_a == 0) + for (i=4*s->img_x*s->img_y-1; i >= 0; i -= 4) + out[i] = 255; + + if (flip_vertically) { + stbi_uc t; + for (j=0; j < (int) s->img_y>>1; ++j) { + stbi_uc *p1 = out + j *s->img_x*target; + stbi_uc *p2 = out + (s->img_y-1-j)*s->img_x*target; + for (i=0; i < (int) s->img_x*target; ++i) { + t = p1[i]; p1[i] = p2[i]; p2[i] = t; + } + } + } + + if (req_comp && req_comp != target) { + out = stbi__convert_format(out, target, req_comp, s->img_x, s->img_y); + if (out == NULL) return out; // stbi__convert_format frees input on failure + } + + *x = s->img_x; + *y = s->img_y; + if (comp) *comp = s->img_n; + return out; +} +#endif + +// Targa Truevision - TGA +// by Jonathan Dummer +#ifndef STBI_NO_TGA +// returns STBI_rgb or whatever, 0 on error +static int stbi__tga_get_comp(int bits_per_pixel, int is_grey, int* is_rgb16) +{ + // only RGB or RGBA (incl. 16bit) or grey allowed + if (is_rgb16) *is_rgb16 = 0; + switch(bits_per_pixel) { + case 8: return STBI_grey; + case 16: if(is_grey) return STBI_grey_alpha; + // fallthrough + case 15: if(is_rgb16) *is_rgb16 = 1; + return STBI_rgb; + case 24: // fallthrough + case 32: return bits_per_pixel/8; + default: return 0; + } +} + +static int stbi__tga_info(stbi__context *s, int *x, int *y, int *comp) +{ + int tga_w, tga_h, tga_comp, tga_image_type, tga_bits_per_pixel, tga_colormap_bpp; + int sz, tga_colormap_type; + stbi__get8(s); // discard Offset + tga_colormap_type = stbi__get8(s); // colormap type + if( tga_colormap_type > 1 ) { + stbi__rewind(s); + return 0; // only RGB or indexed allowed + } + tga_image_type = stbi__get8(s); // image type + if ( tga_colormap_type == 1 ) { // colormapped (paletted) image + if (tga_image_type != 1 && tga_image_type != 9) { + stbi__rewind(s); + return 0; + } + stbi__skip(s,4); // skip index of first colormap entry and number of entries + sz = stbi__get8(s); // check bits per palette color entry + if ( (sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32) ) { + stbi__rewind(s); + return 0; + } + stbi__skip(s,4); // skip image x and y origin + tga_colormap_bpp = sz; + } else { // "normal" image w/o colormap - only RGB or grey allowed, +/- RLE + if ( (tga_image_type != 2) && (tga_image_type != 3) && (tga_image_type != 10) && (tga_image_type != 11) ) { + stbi__rewind(s); + return 0; // only RGB or grey allowed, +/- RLE + } + stbi__skip(s,9); // skip colormap specification and image x/y origin + tga_colormap_bpp = 0; + } + tga_w = stbi__get16le(s); + if( tga_w < 1 ) { + stbi__rewind(s); + return 0; // test width + } + tga_h = stbi__get16le(s); + if( tga_h < 1 ) { + stbi__rewind(s); + return 0; // test height + } + tga_bits_per_pixel = stbi__get8(s); // bits per pixel + stbi__get8(s); // ignore alpha bits + if (tga_colormap_bpp != 0) { + if((tga_bits_per_pixel != 8) && (tga_bits_per_pixel != 16)) { + // when using a colormap, tga_bits_per_pixel is the size of the indexes + // I don't think anything but 8 or 16bit indexes makes sense + stbi__rewind(s); + return 0; + } + tga_comp = stbi__tga_get_comp(tga_colormap_bpp, 0, NULL); + } else { + tga_comp = stbi__tga_get_comp(tga_bits_per_pixel, (tga_image_type == 3) || (tga_image_type == 11), NULL); + } + if(!tga_comp) { + stbi__rewind(s); + return 0; + } + if (x) *x = tga_w; + if (y) *y = tga_h; + if (comp) *comp = tga_comp; + return 1; // seems to have passed everything +} + +static int stbi__tga_test(stbi__context *s) +{ + int res = 0; + int sz, tga_color_type; + stbi__get8(s); // discard Offset + tga_color_type = stbi__get8(s); // color type + if ( tga_color_type > 1 ) goto errorEnd; // only RGB or indexed allowed + sz = stbi__get8(s); // image type + if ( tga_color_type == 1 ) { // colormapped (paletted) image + if (sz != 1 && sz != 9) goto errorEnd; // colortype 1 demands image type 1 or 9 + stbi__skip(s,4); // skip index of first colormap entry and number of entries + sz = stbi__get8(s); // check bits per palette color entry + if ( (sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32) ) goto errorEnd; + stbi__skip(s,4); // skip image x and y origin + } else { // "normal" image w/o colormap + if ( (sz != 2) && (sz != 3) && (sz != 10) && (sz != 11) ) goto errorEnd; // only RGB or grey allowed, +/- RLE + stbi__skip(s,9); // skip colormap specification and image x/y origin + } + if ( stbi__get16le(s) < 1 ) goto errorEnd; // test width + if ( stbi__get16le(s) < 1 ) goto errorEnd; // test height + sz = stbi__get8(s); // bits per pixel + if ( (tga_color_type == 1) && (sz != 8) && (sz != 16) ) goto errorEnd; // for colormapped images, bpp is size of an index + if ( (sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32) ) goto errorEnd; + + res = 1; // if we got this far, everything's good and we can return 1 instead of 0 + +errorEnd: + stbi__rewind(s); + return res; +} + +// read 16bit value and convert to 24bit RGB +static void stbi__tga_read_rgb16(stbi__context *s, stbi_uc* out) +{ + stbi__uint16 px = (stbi__uint16)stbi__get16le(s); + stbi__uint16 fiveBitMask = 31; + // we have 3 channels with 5bits each + int r = (px >> 10) & fiveBitMask; + int g = (px >> 5) & fiveBitMask; + int b = px & fiveBitMask; + // Note that this saves the data in RGB(A) order, so it doesn't need to be swapped later + out[0] = (stbi_uc)((r * 255)/31); + out[1] = (stbi_uc)((g * 255)/31); + out[2] = (stbi_uc)((b * 255)/31); + + // some people claim that the most significant bit might be used for alpha + // (possibly if an alpha-bit is set in the "image descriptor byte") + // but that only made 16bit test images completely translucent.. + // so let's treat all 15 and 16bit TGAs as RGB with no alpha. +} + +static void *stbi__tga_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri) +{ + // read in the TGA header stuff + int tga_offset = stbi__get8(s); + int tga_indexed = stbi__get8(s); + int tga_image_type = stbi__get8(s); + int tga_is_RLE = 0; + int tga_palette_start = stbi__get16le(s); + int tga_palette_len = stbi__get16le(s); + int tga_palette_bits = stbi__get8(s); + int tga_x_origin = stbi__get16le(s); + int tga_y_origin = stbi__get16le(s); + int tga_width = stbi__get16le(s); + int tga_height = stbi__get16le(s); + int tga_bits_per_pixel = stbi__get8(s); + int tga_comp, tga_rgb16=0; + int tga_inverted = stbi__get8(s); + // int tga_alpha_bits = tga_inverted & 15; // the 4 lowest bits - unused (useless?) + // image data + unsigned char *tga_data; + unsigned char *tga_palette = NULL; + int i, j; + unsigned char raw_data[4] = {0}; + int RLE_count = 0; + int RLE_repeating = 0; + int read_next_pixel = 1; + STBI_NOTUSED(ri); + + // do a tiny bit of precessing + if ( tga_image_type >= 8 ) + { + tga_image_type -= 8; + tga_is_RLE = 1; + } + tga_inverted = 1 - ((tga_inverted >> 5) & 1); + + // If I'm paletted, then I'll use the number of bits from the palette + if ( tga_indexed ) tga_comp = stbi__tga_get_comp(tga_palette_bits, 0, &tga_rgb16); + else tga_comp = stbi__tga_get_comp(tga_bits_per_pixel, (tga_image_type == 3), &tga_rgb16); + + if(!tga_comp) // shouldn't really happen, stbi__tga_test() should have ensured basic consistency + return stbi__errpuc("bad format", "Can't find out TGA pixelformat"); + + // tga info + *x = tga_width; + *y = tga_height; + if (comp) *comp = tga_comp; + + if (!stbi__mad3sizes_valid(tga_width, tga_height, tga_comp, 0)) + return stbi__errpuc("too large", "Corrupt TGA"); + + tga_data = (unsigned char*)stbi__malloc_mad3(tga_width, tga_height, tga_comp, 0); + if (!tga_data) return stbi__errpuc("outofmem", "Out of memory"); + + // skip to the data's starting position (offset usually = 0) + stbi__skip(s, tga_offset ); + + if ( !tga_indexed && !tga_is_RLE && !tga_rgb16 ) { + for (i=0; i < tga_height; ++i) { + int row = tga_inverted ? tga_height -i - 1 : i; + stbi_uc *tga_row = tga_data + row*tga_width*tga_comp; + stbi__getn(s, tga_row, tga_width * tga_comp); + } + } else { + // do I need to load a palette? + if ( tga_indexed) + { + // any data to skip? (offset usually = 0) + stbi__skip(s, tga_palette_start ); + // load the palette + tga_palette = (unsigned char*)stbi__malloc_mad2(tga_palette_len, tga_comp, 0); + if (!tga_palette) { + STBI_FREE(tga_data); + return stbi__errpuc("outofmem", "Out of memory"); + } + if (tga_rgb16) { + stbi_uc *pal_entry = tga_palette; + STBI_ASSERT(tga_comp == STBI_rgb); + for (i=0; i < tga_palette_len; ++i) { + stbi__tga_read_rgb16(s, pal_entry); + pal_entry += tga_comp; + } + } else if (!stbi__getn(s, tga_palette, tga_palette_len * tga_comp)) { + STBI_FREE(tga_data); + STBI_FREE(tga_palette); + return stbi__errpuc("bad palette", "Corrupt TGA"); + } + } + // load the data + for (i=0; i < tga_width * tga_height; ++i) + { + // if I'm in RLE mode, do I need to get a RLE stbi__pngchunk? + if ( tga_is_RLE ) + { + if ( RLE_count == 0 ) + { + // yep, get the next byte as a RLE command + int RLE_cmd = stbi__get8(s); + RLE_count = 1 + (RLE_cmd & 127); + RLE_repeating = RLE_cmd >> 7; + read_next_pixel = 1; + } else if ( !RLE_repeating ) + { + read_next_pixel = 1; + } + } else + { + read_next_pixel = 1; + } + // OK, if I need to read a pixel, do it now + if ( read_next_pixel ) + { + // load however much data we did have + if ( tga_indexed ) + { + // read in index, then perform the lookup + int pal_idx = (tga_bits_per_pixel == 8) ? stbi__get8(s) : stbi__get16le(s); + if ( pal_idx >= tga_palette_len ) { + // invalid index + pal_idx = 0; + } + pal_idx *= tga_comp; + for (j = 0; j < tga_comp; ++j) { + raw_data[j] = tga_palette[pal_idx+j]; + } + } else if(tga_rgb16) { + STBI_ASSERT(tga_comp == STBI_rgb); + stbi__tga_read_rgb16(s, raw_data); + } else { + // read in the data raw + for (j = 0; j < tga_comp; ++j) { + raw_data[j] = stbi__get8(s); + } + } + // clear the reading flag for the next pixel + read_next_pixel = 0; + } // end of reading a pixel + + // copy data + for (j = 0; j < tga_comp; ++j) + tga_data[i*tga_comp+j] = raw_data[j]; + + // in case we're in RLE mode, keep counting down + --RLE_count; + } + // do I need to invert the image? + if ( tga_inverted ) + { + for (j = 0; j*2 < tga_height; ++j) + { + int index1 = j * tga_width * tga_comp; + int index2 = (tga_height - 1 - j) * tga_width * tga_comp; + for (i = tga_width * tga_comp; i > 0; --i) + { + unsigned char temp = tga_data[index1]; + tga_data[index1] = tga_data[index2]; + tga_data[index2] = temp; + ++index1; + ++index2; + } + } + } + // clear my palette, if I had one + if ( tga_palette != NULL ) + { + STBI_FREE( tga_palette ); + } + } + + // swap RGB - if the source data was RGB16, it already is in the right order + if (tga_comp >= 3 && !tga_rgb16) + { + unsigned char* tga_pixel = tga_data; + for (i=0; i < tga_width * tga_height; ++i) + { + unsigned char temp = tga_pixel[0]; + tga_pixel[0] = tga_pixel[2]; + tga_pixel[2] = temp; + tga_pixel += tga_comp; + } + } + + // convert to target component count + if (req_comp && req_comp != tga_comp) + tga_data = stbi__convert_format(tga_data, tga_comp, req_comp, tga_width, tga_height); + + // the things I do to get rid of an error message, and yet keep + // Microsoft's C compilers happy... [8^( + tga_palette_start = tga_palette_len = tga_palette_bits = + tga_x_origin = tga_y_origin = 0; + // OK, done + return tga_data; +} +#endif + +// ************************************************************************************************* +// Photoshop PSD loader -- PD by Thatcher Ulrich, integration by Nicolas Schulz, tweaked by STB + +#ifndef STBI_NO_PSD +static int stbi__psd_test(stbi__context *s) +{ + int r = (stbi__get32be(s) == 0x38425053); + stbi__rewind(s); + return r; +} + +static int stbi__psd_decode_rle(stbi__context *s, stbi_uc *p, int pixelCount) +{ + int count, nleft, len; + + count = 0; + while ((nleft = pixelCount - count) > 0) { + len = stbi__get8(s); + if (len == 128) { + // No-op. + } else if (len < 128) { + // Copy next len+1 bytes literally. + len++; + if (len > nleft) return 0; // corrupt data + count += len; + while (len) { + *p = stbi__get8(s); + p += 4; + len--; + } + } else if (len > 128) { + stbi_uc val; + // Next -len+1 bytes in the dest are replicated from next source byte. + // (Interpret len as a negative 8-bit int.) + len = 257 - len; + if (len > nleft) return 0; // corrupt data + val = stbi__get8(s); + count += len; + while (len) { + *p = val; + p += 4; + len--; + } + } + } + + return 1; +} + +static void *stbi__psd_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri, int bpc) +{ + int pixelCount; + int channelCount, compression; + int channel, i; + int bitdepth; + int w,h; + stbi_uc *out; + STBI_NOTUSED(ri); + + // Check identifier + if (stbi__get32be(s) != 0x38425053) // "8BPS" + return stbi__errpuc("not PSD", "Corrupt PSD image"); + + // Check file type version. + if (stbi__get16be(s) != 1) + return stbi__errpuc("wrong version", "Unsupported version of PSD image"); + + // Skip 6 reserved bytes. + stbi__skip(s, 6 ); + + // Read the number of channels (R, G, B, A, etc). + channelCount = stbi__get16be(s); + if (channelCount < 0 || channelCount > 16) + return stbi__errpuc("wrong channel count", "Unsupported number of channels in PSD image"); + + // Read the rows and columns of the image. + h = stbi__get32be(s); + w = stbi__get32be(s); + + // Make sure the depth is 8 bits. + bitdepth = stbi__get16be(s); + if (bitdepth != 8 && bitdepth != 16) + return stbi__errpuc("unsupported bit depth", "PSD bit depth is not 8 or 16 bit"); + + // Make sure the color mode is RGB. + // Valid options are: + // 0: Bitmap + // 1: Grayscale + // 2: Indexed color + // 3: RGB color + // 4: CMYK color + // 7: Multichannel + // 8: Duotone + // 9: Lab color + if (stbi__get16be(s) != 3) + return stbi__errpuc("wrong color format", "PSD is not in RGB color format"); + + // Skip the Mode Data. (It's the palette for indexed color; other info for other modes.) + stbi__skip(s,stbi__get32be(s) ); + + // Skip the image resources. (resolution, pen tool paths, etc) + stbi__skip(s, stbi__get32be(s) ); + + // Skip the reserved data. + stbi__skip(s, stbi__get32be(s) ); + + // Find out if the data is compressed. + // Known values: + // 0: no compression + // 1: RLE compressed + compression = stbi__get16be(s); + if (compression > 1) + return stbi__errpuc("bad compression", "PSD has an unknown compression format"); + + // Check size + if (!stbi__mad3sizes_valid(4, w, h, 0)) + return stbi__errpuc("too large", "Corrupt PSD"); + + // Create the destination image. + + if (!compression && bitdepth == 16 && bpc == 16) { + out = (stbi_uc *) stbi__malloc_mad3(8, w, h, 0); + ri->bits_per_channel = 16; + } else + out = (stbi_uc *) stbi__malloc(4 * w*h); + + if (!out) return stbi__errpuc("outofmem", "Out of memory"); + pixelCount = w*h; + + // Initialize the data to zero. + //memset( out, 0, pixelCount * 4 ); + + // Finally, the image data. + if (compression) { + // RLE as used by .PSD and .TIFF + // Loop until you get the number of unpacked bytes you are expecting: + // Read the next source byte into n. + // If n is between 0 and 127 inclusive, copy the next n+1 bytes literally. + // Else if n is between -127 and -1 inclusive, copy the next byte -n+1 times. + // Else if n is 128, noop. + // Endloop + + // The RLE-compressed data is preceded by a 2-byte data count for each row in the data, + // which we're going to just skip. + stbi__skip(s, h * channelCount * 2 ); + + // Read the RLE data by channel. + for (channel = 0; channel < 4; channel++) { + stbi_uc *p; + + p = out+channel; + if (channel >= channelCount) { + // Fill this channel with default data. + for (i = 0; i < pixelCount; i++, p += 4) + *p = (channel == 3 ? 255 : 0); + } else { + // Read the RLE data. + if (!stbi__psd_decode_rle(s, p, pixelCount)) { + STBI_FREE(out); + return stbi__errpuc("corrupt", "bad RLE data"); + } + } + } + + } else { + // We're at the raw image data. It's each channel in order (Red, Green, Blue, Alpha, ...) + // where each channel consists of an 8-bit (or 16-bit) value for each pixel in the image. + + // Read the data by channel. + for (channel = 0; channel < 4; channel++) { + if (channel >= channelCount) { + // Fill this channel with default data. + if (bitdepth == 16 && bpc == 16) { + stbi__uint16 *q = ((stbi__uint16 *) out) + channel; + stbi__uint16 val = channel == 3 ? 65535 : 0; + for (i = 0; i < pixelCount; i++, q += 4) + *q = val; + } else { + stbi_uc *p = out+channel; + stbi_uc val = channel == 3 ? 255 : 0; + for (i = 0; i < pixelCount; i++, p += 4) + *p = val; + } + } else { + if (ri->bits_per_channel == 16) { // output bpc + stbi__uint16 *q = ((stbi__uint16 *) out) + channel; + for (i = 0; i < pixelCount; i++, q += 4) + *q = (stbi__uint16) stbi__get16be(s); + } else { + stbi_uc *p = out+channel; + if (bitdepth == 16) { // input bpc + for (i = 0; i < pixelCount; i++, p += 4) + *p = (stbi_uc) (stbi__get16be(s) >> 8); + } else { + for (i = 0; i < pixelCount; i++, p += 4) + *p = stbi__get8(s); + } + } + } + } + } + + // remove weird white matte from PSD + if (channelCount >= 4) { + if (ri->bits_per_channel == 16) { + for (i=0; i < w*h; ++i) { + stbi__uint16 *pixel = (stbi__uint16 *) out + 4*i; + if (pixel[3] != 0 && pixel[3] != 65535) { + float a = pixel[3] / 65535.0f; + float ra = 1.0f / a; + float inv_a = 65535.0f * (1 - ra); + pixel[0] = (stbi__uint16) (pixel[0]*ra + inv_a); + pixel[1] = (stbi__uint16) (pixel[1]*ra + inv_a); + pixel[2] = (stbi__uint16) (pixel[2]*ra + inv_a); + } + } + } else { + for (i=0; i < w*h; ++i) { + unsigned char *pixel = out + 4*i; + if (pixel[3] != 0 && pixel[3] != 255) { + float a = pixel[3] / 255.0f; + float ra = 1.0f / a; + float inv_a = 255.0f * (1 - ra); + pixel[0] = (unsigned char) (pixel[0]*ra + inv_a); + pixel[1] = (unsigned char) (pixel[1]*ra + inv_a); + pixel[2] = (unsigned char) (pixel[2]*ra + inv_a); + } + } + } + } + + // convert to desired output format + if (req_comp && req_comp != 4) { + if (ri->bits_per_channel == 16) + out = (stbi_uc *) stbi__convert_format16((stbi__uint16 *) out, 4, req_comp, w, h); + else + out = stbi__convert_format(out, 4, req_comp, w, h); + if (out == NULL) return out; // stbi__convert_format frees input on failure + } + + if (comp) *comp = 4; + *y = h; + *x = w; + + return out; +} +#endif + +// ************************************************************************************************* +// Softimage PIC loader +// by Tom Seddon +// +// See http://softimage.wiki.softimage.com/index.php/INFO:_PIC_file_format +// See http://ozviz.wasp.uwa.edu.au/~pbourke/dataformats/softimagepic/ + +#ifndef STBI_NO_PIC +static int stbi__pic_is4(stbi__context *s,const char *str) +{ + int i; + for (i=0; i<4; ++i) + if (stbi__get8(s) != (stbi_uc)str[i]) + return 0; + + return 1; +} + +static int stbi__pic_test_core(stbi__context *s) +{ + int i; + + if (!stbi__pic_is4(s,"\x53\x80\xF6\x34")) + return 0; + + for(i=0;i<84;++i) + stbi__get8(s); + + if (!stbi__pic_is4(s,"PICT")) + return 0; + + return 1; +} + +typedef struct +{ + stbi_uc size,type,channel; +} stbi__pic_packet; + +static stbi_uc *stbi__readval(stbi__context *s, int channel, stbi_uc *dest) +{ + int mask=0x80, i; + + for (i=0; i<4; ++i, mask>>=1) { + if (channel & mask) { + if (stbi__at_eof(s)) return stbi__errpuc("bad file","PIC file too short"); + dest[i]=stbi__get8(s); + } + } + + return dest; +} + +static void stbi__copyval(int channel,stbi_uc *dest,const stbi_uc *src) +{ + int mask=0x80,i; + + for (i=0;i<4; ++i, mask>>=1) + if (channel&mask) + dest[i]=src[i]; +} + +static stbi_uc *stbi__pic_load_core(stbi__context *s,int width,int height,int *comp, stbi_uc *result) +{ + int act_comp=0,num_packets=0,y,chained; + stbi__pic_packet packets[10]; + + // this will (should...) cater for even some bizarre stuff like having data + // for the same channel in multiple packets. + do { + stbi__pic_packet *packet; + + if (num_packets==sizeof(packets)/sizeof(packets[0])) + return stbi__errpuc("bad format","too many packets"); + + packet = &packets[num_packets++]; + + chained = stbi__get8(s); + packet->size = stbi__get8(s); + packet->type = stbi__get8(s); + packet->channel = stbi__get8(s); + + act_comp |= packet->channel; + + if (stbi__at_eof(s)) return stbi__errpuc("bad file","file too short (reading packets)"); + if (packet->size != 8) return stbi__errpuc("bad format","packet isn't 8bpp"); + } while (chained); + + *comp = (act_comp & 0x10 ? 4 : 3); // has alpha channel? + + for(y=0; ytype) { + default: + return stbi__errpuc("bad format","packet has bad compression type"); + + case 0: {//uncompressed + int x; + + for(x=0;xchannel,dest)) + return 0; + break; + } + + case 1://Pure RLE + { + int left=width, i; + + while (left>0) { + stbi_uc count,value[4]; + + count=stbi__get8(s); + if (stbi__at_eof(s)) return stbi__errpuc("bad file","file too short (pure read count)"); + + if (count > left) + count = (stbi_uc) left; + + if (!stbi__readval(s,packet->channel,value)) return 0; + + for(i=0; ichannel,dest,value); + left -= count; + } + } + break; + + case 2: {//Mixed RLE + int left=width; + while (left>0) { + int count = stbi__get8(s), i; + if (stbi__at_eof(s)) return stbi__errpuc("bad file","file too short (mixed read count)"); + + if (count >= 128) { // Repeated + stbi_uc value[4]; + + if (count==128) + count = stbi__get16be(s); + else + count -= 127; + if (count > left) + return stbi__errpuc("bad file","scanline overrun"); + + if (!stbi__readval(s,packet->channel,value)) + return 0; + + for(i=0;ichannel,dest,value); + } else { // Raw + ++count; + if (count>left) return stbi__errpuc("bad file","scanline overrun"); + + for(i=0;ichannel,dest)) + return 0; + } + left-=count; + } + break; + } + } + } + } + + return result; +} + +static void *stbi__pic_load(stbi__context *s,int *px,int *py,int *comp,int req_comp, stbi__result_info *ri) +{ + stbi_uc *result; + int i, x,y, internal_comp; + STBI_NOTUSED(ri); + + if (!comp) comp = &internal_comp; + + for (i=0; i<92; ++i) + stbi__get8(s); + + x = stbi__get16be(s); + y = stbi__get16be(s); + if (stbi__at_eof(s)) return stbi__errpuc("bad file","file too short (pic header)"); + if (!stbi__mad3sizes_valid(x, y, 4, 0)) return stbi__errpuc("too large", "PIC image too large to decode"); + + stbi__get32be(s); //skip `ratio' + stbi__get16be(s); //skip `fields' + stbi__get16be(s); //skip `pad' + + // intermediate buffer is RGBA + result = (stbi_uc *) stbi__malloc_mad3(x, y, 4, 0); + memset(result, 0xff, x*y*4); + + if (!stbi__pic_load_core(s,x,y,comp, result)) { + STBI_FREE(result); + result=0; + } + *px = x; + *py = y; + if (req_comp == 0) req_comp = *comp; + result=stbi__convert_format(result,4,req_comp,x,y); + + return result; +} + +static int stbi__pic_test(stbi__context *s) +{ + int r = stbi__pic_test_core(s); + stbi__rewind(s); + return r; +} +#endif + +// ************************************************************************************************* +// GIF loader -- public domain by Jean-Marc Lienher -- simplified/shrunk by stb + +#ifndef STBI_NO_GIF +typedef struct +{ + stbi__int16 prefix; + stbi_uc first; + stbi_uc suffix; +} stbi__gif_lzw; + +typedef struct +{ + int w,h; + stbi_uc *out; // output buffer (always 4 components) + stbi_uc *background; // The current "background" as far as a gif is concerned + stbi_uc *history; + int flags, bgindex, ratio, transparent, eflags; + stbi_uc pal[256][4]; + stbi_uc lpal[256][4]; + stbi__gif_lzw codes[8192]; + stbi_uc *color_table; + int parse, step; + int lflags; + int start_x, start_y; + int max_x, max_y; + int cur_x, cur_y; + int line_size; + int delay; +} stbi__gif; + +static int stbi__gif_test_raw(stbi__context *s) +{ + int sz; + if (stbi__get8(s) != 'G' || stbi__get8(s) != 'I' || stbi__get8(s) != 'F' || stbi__get8(s) != '8') return 0; + sz = stbi__get8(s); + if (sz != '9' && sz != '7') return 0; + if (stbi__get8(s) != 'a') return 0; + return 1; +} + +static int stbi__gif_test(stbi__context *s) +{ + int r = stbi__gif_test_raw(s); + stbi__rewind(s); + return r; +} + +static void stbi__gif_parse_colortable(stbi__context *s, stbi_uc pal[256][4], int num_entries, int transp) +{ + int i; + for (i=0; i < num_entries; ++i) { + pal[i][2] = stbi__get8(s); + pal[i][1] = stbi__get8(s); + pal[i][0] = stbi__get8(s); + pal[i][3] = transp == i ? 0 : 255; + } +} + +static int stbi__gif_header(stbi__context *s, stbi__gif *g, int *comp, int is_info) +{ + stbi_uc version; + if (stbi__get8(s) != 'G' || stbi__get8(s) != 'I' || stbi__get8(s) != 'F' || stbi__get8(s) != '8') + return stbi__err("not GIF", "Corrupt GIF"); + + version = stbi__get8(s); + if (version != '7' && version != '9') return stbi__err("not GIF", "Corrupt GIF"); + if (stbi__get8(s) != 'a') return stbi__err("not GIF", "Corrupt GIF"); + + stbi__g_failure_reason = ""; + g->w = stbi__get16le(s); + g->h = stbi__get16le(s); + g->flags = stbi__get8(s); + g->bgindex = stbi__get8(s); + g->ratio = stbi__get8(s); + g->transparent = -1; + + if (comp != 0) *comp = 4; // can't actually tell whether it's 3 or 4 until we parse the comments + + if (is_info) return 1; + + if (g->flags & 0x80) + stbi__gif_parse_colortable(s,g->pal, 2 << (g->flags & 7), -1); + + return 1; +} + +static int stbi__gif_info_raw(stbi__context *s, int *x, int *y, int *comp) +{ + stbi__gif* g = (stbi__gif*) stbi__malloc(sizeof(stbi__gif)); + if (!stbi__gif_header(s, g, comp, 1)) { + STBI_FREE(g); + stbi__rewind( s ); + return 0; + } + if (x) *x = g->w; + if (y) *y = g->h; + STBI_FREE(g); + return 1; +} + +static void stbi__out_gif_code(stbi__gif *g, stbi__uint16 code) +{ + stbi_uc *p, *c; + int idx; + + // recurse to decode the prefixes, since the linked-list is backwards, + // and working backwards through an interleaved image would be nasty + if (g->codes[code].prefix >= 0) + stbi__out_gif_code(g, g->codes[code].prefix); + + if (g->cur_y >= g->max_y) return; + + idx = g->cur_x + g->cur_y; + p = &g->out[idx]; + g->history[idx / 4] = 1; + + c = &g->color_table[g->codes[code].suffix * 4]; + if (c[3] > 128) { // don't render transparent pixels; + p[0] = c[2]; + p[1] = c[1]; + p[2] = c[0]; + p[3] = c[3]; + } + g->cur_x += 4; + + if (g->cur_x >= g->max_x) { + g->cur_x = g->start_x; + g->cur_y += g->step; + + while (g->cur_y >= g->max_y && g->parse > 0) { + g->step = (1 << g->parse) * g->line_size; + g->cur_y = g->start_y + (g->step >> 1); + --g->parse; + } + } +} + +static stbi_uc *stbi__process_gif_raster(stbi__context *s, stbi__gif *g) +{ + stbi_uc lzw_cs; + stbi__int32 len, init_code; + stbi__uint32 first; + stbi__int32 codesize, codemask, avail, oldcode, bits, valid_bits, clear; + stbi__gif_lzw *p; + + lzw_cs = stbi__get8(s); + if (lzw_cs > 12) return NULL; + clear = 1 << lzw_cs; + first = 1; + codesize = lzw_cs + 1; + codemask = (1 << codesize) - 1; + bits = 0; + valid_bits = 0; + for (init_code = 0; init_code < clear; init_code++) { + g->codes[init_code].prefix = -1; + g->codes[init_code].first = (stbi_uc) init_code; + g->codes[init_code].suffix = (stbi_uc) init_code; + } + + // support no starting clear code + avail = clear+2; + oldcode = -1; + + len = 0; + for(;;) { + if (valid_bits < codesize) { + if (len == 0) { + len = stbi__get8(s); // start new block + if (len == 0) + return g->out; + } + --len; + bits |= (stbi__int32) stbi__get8(s) << valid_bits; + valid_bits += 8; + } else { + stbi__int32 code = bits & codemask; + bits >>= codesize; + valid_bits -= codesize; + // @OPTIMIZE: is there some way we can accelerate the non-clear path? + if (code == clear) { // clear code + codesize = lzw_cs + 1; + codemask = (1 << codesize) - 1; + avail = clear + 2; + oldcode = -1; + first = 0; + } else if (code == clear + 1) { // end of stream code + stbi__skip(s, len); + while ((len = stbi__get8(s)) > 0) + stbi__skip(s,len); + return g->out; + } else if (code <= avail) { + if (first) { + return stbi__errpuc("no clear code", "Corrupt GIF"); + } + + if (oldcode >= 0) { + p = &g->codes[avail++]; + if (avail > 8192) { + return stbi__errpuc("too many codes", "Corrupt GIF"); + } + + p->prefix = (stbi__int16) oldcode; + p->first = g->codes[oldcode].first; + p->suffix = (code == avail) ? p->first : g->codes[code].first; + } else if (code == avail) + return stbi__errpuc("illegal code in raster", "Corrupt GIF"); + + stbi__out_gif_code(g, (stbi__uint16) code); + + if ((avail & codemask) == 0 && avail <= 0x0FFF) { + codesize++; + codemask = (1 << codesize) - 1; + } + + oldcode = code; + } else { + return stbi__errpuc("illegal code in raster", "Corrupt GIF"); + } + } + } +} + +// this function is designed to support animated gifs, although stb_image doesn't support it +// two back is the image from two frames ago, used for a very specific disposal format +static stbi_uc *stbi__gif_load_next(stbi__context *s, stbi__gif *g, int *comp, int req_comp, stbi_uc *two_back) +{ + int dispose; + int first_frame; + int pi; + int pcount; + STBI_NOTUSED(req_comp); + + // on first frame, any non-written pixels get the background colour (non-transparent) + first_frame = 0; + if (g->out == 0) { + if (!stbi__gif_header(s, g, comp,0)) return 0; // stbi__g_failure_reason set by stbi__gif_header + g->out = (stbi_uc *) stbi__malloc(4 * g->w * g->h); + g->background = (stbi_uc *) stbi__malloc(4 * g->w * g->h); + g->history = (stbi_uc *) stbi__malloc(g->w * g->h); + if (g->out == 0) return stbi__errpuc("outofmem", "Out of memory"); + + // image is treated as "transparent" at the start - ie, nothing overwrites the current background; + // background colour is only used for pixels that are not rendered first frame, after that "background" + // color refers to the color that was there the previous frame. + memset( g->out, 0x00, 4 * g->w * g->h ); + memset( g->background, 0x00, 4 * g->w * g->h ); // state of the background (starts transparent) + memset( g->history, 0x00, g->w * g->h ); // pixels that were affected previous frame + first_frame = 1; + } else { + // second frame - how do we dispoase of the previous one? + dispose = (g->eflags & 0x1C) >> 2; + pcount = g->w * g->h; + + if ((dispose == 3) && (two_back == 0)) { + dispose = 2; // if I don't have an image to revert back to, default to the old background + } + + if (dispose == 3) { // use previous graphic + for (pi = 0; pi < pcount; ++pi) { + if (g->history[pi]) { + memcpy( &g->out[pi * 4], &two_back[pi * 4], 4 ); + } + } + } else if (dispose == 2) { + // restore what was changed last frame to background before that frame; + for (pi = 0; pi < pcount; ++pi) { + if (g->history[pi]) { + memcpy( &g->out[pi * 4], &g->background[pi * 4], 4 ); + } + } + } else { + // This is a non-disposal case eithe way, so just + // leave the pixels as is, and they will become the new background + // 1: do not dispose + // 0: not specified. + } + + // background is what out is after the undoing of the previou frame; + memcpy( g->background, g->out, 4 * g->w * g->h ); + } + + // clear my history; + memset( g->history, 0x00, g->w * g->h ); // pixels that were affected previous frame + + for (;;) { + int tag = stbi__get8(s); + switch (tag) { + case 0x2C: /* Image Descriptor */ + { + stbi__int32 x, y, w, h; + stbi_uc *o; + + x = stbi__get16le(s); + y = stbi__get16le(s); + w = stbi__get16le(s); + h = stbi__get16le(s); + if (((x + w) > (g->w)) || ((y + h) > (g->h))) + return stbi__errpuc("bad Image Descriptor", "Corrupt GIF"); + + g->line_size = g->w * 4; + g->start_x = x * 4; + g->start_y = y * g->line_size; + g->max_x = g->start_x + w * 4; + g->max_y = g->start_y + h * g->line_size; + g->cur_x = g->start_x; + g->cur_y = g->start_y; + + g->lflags = stbi__get8(s); + + if (g->lflags & 0x40) { + g->step = 8 * g->line_size; // first interlaced spacing + g->parse = 3; + } else { + g->step = g->line_size; + g->parse = 0; + } + + if (g->lflags & 0x80) { + stbi__gif_parse_colortable(s,g->lpal, 2 << (g->lflags & 7), g->eflags & 0x01 ? g->transparent : -1); + g->color_table = (stbi_uc *) g->lpal; + } else if (g->flags & 0x80) { + g->color_table = (stbi_uc *) g->pal; + } else + return stbi__errpuc("missing color table", "Corrupt GIF"); + + o = stbi__process_gif_raster(s, g); + if (o == NULL) return NULL; + + // if this was the first frame, + pcount = g->w * g->h; + if (first_frame && (g->bgindex > 0)) { + // if first frame, any pixel not drawn to gets the background color + for (pi = 0; pi < pcount; ++pi) { + if (g->history[pi] == 0) { + g->pal[g->bgindex][3] = 255; // just in case it was made transparent, undo that; It will be reset next frame if need be; + memcpy( &g->out[pi * 4], &g->pal[g->bgindex], 4 ); + } + } + } + + return o; + } + + case 0x21: // Comment Extension. + { + int len; + int ext = stbi__get8(s); + if (ext == 0xF9) { // Graphic Control Extension. + len = stbi__get8(s); + if (len == 4) { + g->eflags = stbi__get8(s); + g->delay = 10 * stbi__get16le(s); // delay - 1/100th of a second, saving as 1/1000ths. + + // unset old transparent + if (g->transparent >= 0) { + g->pal[g->transparent][3] = 255; + } + if (g->eflags & 0x01) { + g->transparent = stbi__get8(s); + if (g->transparent >= 0) { + g->pal[g->transparent][3] = 0; + } + } else { + // don't need transparent + stbi__skip(s, 1); + g->transparent = -1; + } + } else { + stbi__skip(s, len); + break; + } + } + while ((len = stbi__get8(s)) != 0) { + stbi__skip(s, len); + } + break; + } + + case 0x3B: // gif stream termination code + return (stbi_uc *) s; // using '1' causes warning on some compilers + + default: + return stbi__errpuc("unknown code", "Corrupt GIF"); + } + } +} + +static void *stbi__load_gif_main(stbi__context *s, int **delays, int *x, int *y, int *z, int *comp, int req_comp) +{ + if (stbi__gif_test(s)) { + int layers = 0; + stbi_uc *u = 0; + stbi_uc *out = 0; + stbi_uc *two_back = 0; + stbi__gif g; + int stride; + memset(&g, 0, sizeof(g)); + if (delays) { + *delays = 0; + } + + do { + u = stbi__gif_load_next(s, &g, comp, req_comp, two_back); + if (u == (stbi_uc *) s) u = 0; // end of animated gif marker + + if (u) { + *x = g.w; + *y = g.h; + ++layers; + stride = g.w * g.h * 4; + + if (out) { + out = (stbi_uc*) STBI_REALLOC( out, layers * stride ); + if (delays) { + *delays = (int*) STBI_REALLOC( *delays, sizeof(int) * layers ); + } + } else { + out = (stbi_uc*)stbi__malloc( layers * stride ); + if (delays) { + *delays = (int*) stbi__malloc( layers * sizeof(int) ); + } + } + memcpy( out + ((layers - 1) * stride), u, stride ); + if (layers >= 2) { + two_back = out - 2 * stride; + } + + if (delays) { + (*delays)[layers - 1U] = g.delay; + } + } + } while (u != 0); + + // free temp buffer; + STBI_FREE(g.out); + STBI_FREE(g.history); + STBI_FREE(g.background); + + // do the final conversion after loading everything; + if (req_comp && req_comp != 4) + out = stbi__convert_format(out, 4, req_comp, layers * g.w, g.h); + + *z = layers; + return out; + } else { + return stbi__errpuc("not GIF", "Image was not as a gif type."); + } +} + +static void *stbi__gif_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri) +{ + stbi_uc *u = 0; + stbi__gif g; + memset(&g, 0, sizeof(g)); + STBI_NOTUSED(ri); + + u = stbi__gif_load_next(s, &g, comp, req_comp, 0); + if (u == (stbi_uc *) s) u = 0; // end of animated gif marker + if (u) { + *x = g.w; + *y = g.h; + + // moved conversion to after successful load so that the same + // can be done for multiple frames. + if (req_comp && req_comp != 4) + u = stbi__convert_format(u, 4, req_comp, g.w, g.h); + } + + // free buffers needed for multiple frame loading; + STBI_FREE(g.history); + STBI_FREE(g.background); + + return u; +} + +static int stbi__gif_info(stbi__context *s, int *x, int *y, int *comp) +{ + return stbi__gif_info_raw(s,x,y,comp); +} +#endif + +// ************************************************************************************************* +// Radiance RGBE HDR loader +// originally by Nicolas Schulz +#ifndef STBI_NO_HDR +static int stbi__hdr_test_core(stbi__context *s, const char *signature) +{ + int i; + for (i=0; signature[i]; ++i) + if (stbi__get8(s) != signature[i]) + return 0; + stbi__rewind(s); + return 1; +} + +static int stbi__hdr_test(stbi__context* s) +{ + int r = stbi__hdr_test_core(s, "#?RADIANCE\n"); + stbi__rewind(s); + if(!r) { + r = stbi__hdr_test_core(s, "#?RGBE\n"); + stbi__rewind(s); + } + return r; +} + +#define STBI__HDR_BUFLEN 1024 +static char *stbi__hdr_gettoken(stbi__context *z, char *buffer) +{ + int len=0; + char c = '\0'; + + c = (char) stbi__get8(z); + + while (!stbi__at_eof(z) && c != '\n') { + buffer[len++] = c; + if (len == STBI__HDR_BUFLEN-1) { + // flush to end of line + while (!stbi__at_eof(z) && stbi__get8(z) != '\n') + ; + break; + } + c = (char) stbi__get8(z); + } + + buffer[len] = 0; + return buffer; +} + +static void stbi__hdr_convert(float *output, stbi_uc *input, int req_comp) +{ + if ( input[3] != 0 ) { + float f1; + // Exponent + f1 = (float) ldexp(1.0f, input[3] - (int)(128 + 8)); + if (req_comp <= 2) + output[0] = (input[0] + input[1] + input[2]) * f1 / 3; + else { + output[0] = input[0] * f1; + output[1] = input[1] * f1; + output[2] = input[2] * f1; + } + if (req_comp == 2) output[1] = 1; + if (req_comp == 4) output[3] = 1; + } else { + switch (req_comp) { + case 4: output[3] = 1; /* fallthrough */ + case 3: output[0] = output[1] = output[2] = 0; + break; + case 2: output[1] = 1; /* fallthrough */ + case 1: output[0] = 0; + break; + } + } +} + +static float *stbi__hdr_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri) +{ + char buffer[STBI__HDR_BUFLEN]; + char *token; + int valid = 0; + int width, height; + stbi_uc *scanline; + float *hdr_data; + int len; + unsigned char count, value; + int i, j, k, c1,c2, z; + const char *headerToken; + STBI_NOTUSED(ri); + + // Check identifier + headerToken = stbi__hdr_gettoken(s,buffer); + if (strcmp(headerToken, "#?RADIANCE") != 0 && strcmp(headerToken, "#?RGBE") != 0) + return stbi__errpf("not HDR", "Corrupt HDR image"); + + // Parse header + for(;;) { + token = stbi__hdr_gettoken(s,buffer); + if (token[0] == 0) break; + if (strcmp(token, "FORMAT=32-bit_rle_rgbe") == 0) valid = 1; + } + + if (!valid) return stbi__errpf("unsupported format", "Unsupported HDR format"); + + // Parse width and height + // can't use sscanf() if we're not using stdio! + token = stbi__hdr_gettoken(s,buffer); + if (strncmp(token, "-Y ", 3)) return stbi__errpf("unsupported data layout", "Unsupported HDR format"); + token += 3; + height = (int) strtol(token, &token, 10); + while (*token == ' ') ++token; + if (strncmp(token, "+X ", 3)) return stbi__errpf("unsupported data layout", "Unsupported HDR format"); + token += 3; + width = (int) strtol(token, NULL, 10); + + *x = width; + *y = height; + + if (comp) *comp = 3; + if (req_comp == 0) req_comp = 3; + + if (!stbi__mad4sizes_valid(width, height, req_comp, sizeof(float), 0)) + return stbi__errpf("too large", "HDR image is too large"); + + // Read data + hdr_data = (float *) stbi__malloc_mad4(width, height, req_comp, sizeof(float), 0); + if (!hdr_data) + return stbi__errpf("outofmem", "Out of memory"); + + // Load image data + // image data is stored as some number of sca + if ( width < 8 || width >= 32768) { + // Read flat data + for (j=0; j < height; ++j) { + for (i=0; i < width; ++i) { + stbi_uc rgbe[4]; + main_decode_loop: + stbi__getn(s, rgbe, 4); + stbi__hdr_convert(hdr_data + j * width * req_comp + i * req_comp, rgbe, req_comp); + } + } + } else { + // Read RLE-encoded data + scanline = NULL; + + for (j = 0; j < height; ++j) { + c1 = stbi__get8(s); + c2 = stbi__get8(s); + len = stbi__get8(s); + if (c1 != 2 || c2 != 2 || (len & 0x80)) { + // not run-length encoded, so we have to actually use THIS data as a decoded + // pixel (note this can't be a valid pixel--one of RGB must be >= 128) + stbi_uc rgbe[4]; + rgbe[0] = (stbi_uc) c1; + rgbe[1] = (stbi_uc) c2; + rgbe[2] = (stbi_uc) len; + rgbe[3] = (stbi_uc) stbi__get8(s); + stbi__hdr_convert(hdr_data, rgbe, req_comp); + i = 1; + j = 0; + STBI_FREE(scanline); + goto main_decode_loop; // yes, this makes no sense + } + len <<= 8; + len |= stbi__get8(s); + if (len != width) { STBI_FREE(hdr_data); STBI_FREE(scanline); return stbi__errpf("invalid decoded scanline length", "corrupt HDR"); } + if (scanline == NULL) { + scanline = (stbi_uc *) stbi__malloc_mad2(width, 4, 0); + if (!scanline) { + STBI_FREE(hdr_data); + return stbi__errpf("outofmem", "Out of memory"); + } + } + + for (k = 0; k < 4; ++k) { + int nleft; + i = 0; + while ((nleft = width - i) > 0) { + count = stbi__get8(s); + if (count > 128) { + // Run + value = stbi__get8(s); + count -= 128; + if (count > nleft) { STBI_FREE(hdr_data); STBI_FREE(scanline); return stbi__errpf("corrupt", "bad RLE data in HDR"); } + for (z = 0; z < count; ++z) + scanline[i++ * 4 + k] = value; + } else { + // Dump + if (count > nleft) { STBI_FREE(hdr_data); STBI_FREE(scanline); return stbi__errpf("corrupt", "bad RLE data in HDR"); } + for (z = 0; z < count; ++z) + scanline[i++ * 4 + k] = stbi__get8(s); + } + } + } + for (i=0; i < width; ++i) + stbi__hdr_convert(hdr_data+(j*width + i)*req_comp, scanline + i*4, req_comp); + } + if (scanline) + STBI_FREE(scanline); + } + + return hdr_data; +} + +static int stbi__hdr_info(stbi__context *s, int *x, int *y, int *comp) +{ + char buffer[STBI__HDR_BUFLEN]; + char *token; + int valid = 0; + int dummy; + + if (!x) x = &dummy; + if (!y) y = &dummy; + if (!comp) comp = &dummy; + + if (stbi__hdr_test(s) == 0) { + stbi__rewind( s ); + return 0; + } + + for(;;) { + token = stbi__hdr_gettoken(s,buffer); + if (token[0] == 0) break; + if (strcmp(token, "FORMAT=32-bit_rle_rgbe") == 0) valid = 1; + } + + if (!valid) { + stbi__rewind( s ); + return 0; + } + token = stbi__hdr_gettoken(s,buffer); + if (strncmp(token, "-Y ", 3)) { + stbi__rewind( s ); + return 0; + } + token += 3; + *y = (int) strtol(token, &token, 10); + while (*token == ' ') ++token; + if (strncmp(token, "+X ", 3)) { + stbi__rewind( s ); + return 0; + } + token += 3; + *x = (int) strtol(token, NULL, 10); + *comp = 3; + return 1; +} +#endif // STBI_NO_HDR + +#ifndef STBI_NO_BMP +static int stbi__bmp_info(stbi__context *s, int *x, int *y, int *comp) +{ + void *p; + stbi__bmp_data info; + + info.all_a = 255; + p = stbi__bmp_parse_header(s, &info); + stbi__rewind( s ); + if (p == NULL) + return 0; + if (x) *x = s->img_x; + if (y) *y = s->img_y; + if (comp) *comp = info.ma ? 4 : 3; + return 1; +} +#endif + +#ifndef STBI_NO_PSD +static int stbi__psd_info(stbi__context *s, int *x, int *y, int *comp) +{ + int channelCount, dummy, depth; + if (!x) x = &dummy; + if (!y) y = &dummy; + if (!comp) comp = &dummy; + if (stbi__get32be(s) != 0x38425053) { + stbi__rewind( s ); + return 0; + } + if (stbi__get16be(s) != 1) { + stbi__rewind( s ); + return 0; + } + stbi__skip(s, 6); + channelCount = stbi__get16be(s); + if (channelCount < 0 || channelCount > 16) { + stbi__rewind( s ); + return 0; + } + *y = stbi__get32be(s); + *x = stbi__get32be(s); + depth = stbi__get16be(s); + if (depth != 8 && depth != 16) { + stbi__rewind( s ); + return 0; + } + if (stbi__get16be(s) != 3) { + stbi__rewind( s ); + return 0; + } + *comp = 4; + return 1; +} + +static int stbi__psd_is16(stbi__context *s) +{ + int channelCount, depth; + if (stbi__get32be(s) != 0x38425053) { + stbi__rewind( s ); + return 0; + } + if (stbi__get16be(s) != 1) { + stbi__rewind( s ); + return 0; + } + stbi__skip(s, 6); + channelCount = stbi__get16be(s); + if (channelCount < 0 || channelCount > 16) { + stbi__rewind( s ); + return 0; + } + (void) stbi__get32be(s); + (void) stbi__get32be(s); + depth = stbi__get16be(s); + if (depth != 16) { + stbi__rewind( s ); + return 0; + } + return 1; +} +#endif + +#ifndef STBI_NO_PIC +static int stbi__pic_info(stbi__context *s, int *x, int *y, int *comp) +{ + int act_comp=0,num_packets=0,chained,dummy; + stbi__pic_packet packets[10]; + + if (!x) x = &dummy; + if (!y) y = &dummy; + if (!comp) comp = &dummy; + + if (!stbi__pic_is4(s,"\x53\x80\xF6\x34")) { + stbi__rewind(s); + return 0; + } + + stbi__skip(s, 88); + + *x = stbi__get16be(s); + *y = stbi__get16be(s); + if (stbi__at_eof(s)) { + stbi__rewind( s); + return 0; + } + if ( (*x) != 0 && (1 << 28) / (*x) < (*y)) { + stbi__rewind( s ); + return 0; + } + + stbi__skip(s, 8); + + do { + stbi__pic_packet *packet; + + if (num_packets==sizeof(packets)/sizeof(packets[0])) + return 0; + + packet = &packets[num_packets++]; + chained = stbi__get8(s); + packet->size = stbi__get8(s); + packet->type = stbi__get8(s); + packet->channel = stbi__get8(s); + act_comp |= packet->channel; + + if (stbi__at_eof(s)) { + stbi__rewind( s ); + return 0; + } + if (packet->size != 8) { + stbi__rewind( s ); + return 0; + } + } while (chained); + + *comp = (act_comp & 0x10 ? 4 : 3); + + return 1; +} +#endif + +// ************************************************************************************************* +// Portable Gray Map and Portable Pixel Map loader +// by Ken Miller +// +// PGM: http://netpbm.sourceforge.net/doc/pgm.html +// PPM: http://netpbm.sourceforge.net/doc/ppm.html +// +// Known limitations: +// Does not support comments in the header section +// Does not support ASCII image data (formats P2 and P3) +// Does not support 16-bit-per-channel + +#ifndef STBI_NO_PNM + +static int stbi__pnm_test(stbi__context *s) +{ + char p, t; + p = (char) stbi__get8(s); + t = (char) stbi__get8(s); + if (p != 'P' || (t != '5' && t != '6')) { + stbi__rewind( s ); + return 0; + } + return 1; +} + +static void *stbi__pnm_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri) +{ + stbi_uc *out; + STBI_NOTUSED(ri); + + if (!stbi__pnm_info(s, (int *)&s->img_x, (int *)&s->img_y, (int *)&s->img_n)) + return 0; + + *x = s->img_x; + *y = s->img_y; + if (comp) *comp = s->img_n; + + if (!stbi__mad3sizes_valid(s->img_n, s->img_x, s->img_y, 0)) + return stbi__errpuc("too large", "PNM too large"); + + out = (stbi_uc *) stbi__malloc_mad3(s->img_n, s->img_x, s->img_y, 0); + if (!out) return stbi__errpuc("outofmem", "Out of memory"); + stbi__getn(s, out, s->img_n * s->img_x * s->img_y); + + if (req_comp && req_comp != s->img_n) { + out = stbi__convert_format(out, s->img_n, req_comp, s->img_x, s->img_y); + if (out == NULL) return out; // stbi__convert_format frees input on failure + } + return out; +} + +static int stbi__pnm_isspace(char c) +{ + return c == ' ' || c == '\t' || c == '\n' || c == '\v' || c == '\f' || c == '\r'; +} + +static void stbi__pnm_skip_whitespace(stbi__context *s, char *c) +{ + for (;;) { + while (!stbi__at_eof(s) && stbi__pnm_isspace(*c)) + *c = (char) stbi__get8(s); + + if (stbi__at_eof(s) || *c != '#') + break; + + while (!stbi__at_eof(s) && *c != '\n' && *c != '\r' ) + *c = (char) stbi__get8(s); + } +} + +static int stbi__pnm_isdigit(char c) +{ + return c >= '0' && c <= '9'; +} + +static int stbi__pnm_getinteger(stbi__context *s, char *c) +{ + int value = 0; + + while (!stbi__at_eof(s) && stbi__pnm_isdigit(*c)) { + value = value*10 + (*c - '0'); + *c = (char) stbi__get8(s); + } + + return value; +} + +static int stbi__pnm_info(stbi__context *s, int *x, int *y, int *comp) +{ + int maxv, dummy; + char c, p, t; + + if (!x) x = &dummy; + if (!y) y = &dummy; + if (!comp) comp = &dummy; + + stbi__rewind(s); + + // Get identifier + p = (char) stbi__get8(s); + t = (char) stbi__get8(s); + if (p != 'P' || (t != '5' && t != '6')) { + stbi__rewind(s); + return 0; + } + + *comp = (t == '6') ? 3 : 1; // '5' is 1-component .pgm; '6' is 3-component .ppm + + c = (char) stbi__get8(s); + stbi__pnm_skip_whitespace(s, &c); + + *x = stbi__pnm_getinteger(s, &c); // read width + stbi__pnm_skip_whitespace(s, &c); + + *y = stbi__pnm_getinteger(s, &c); // read height + stbi__pnm_skip_whitespace(s, &c); + + maxv = stbi__pnm_getinteger(s, &c); // read max value + + if (maxv > 255) + return stbi__err("max value > 255", "PPM image not 8-bit"); + else + return 1; +} +#endif + +static int stbi__info_main(stbi__context *s, int *x, int *y, int *comp) +{ + #ifndef STBI_NO_JPEG + if (stbi__jpeg_info(s, x, y, comp)) return 1; + #endif + + #ifndef STBI_NO_PNG + if (stbi__png_info(s, x, y, comp)) return 1; + #endif + + #ifndef STBI_NO_GIF + if (stbi__gif_info(s, x, y, comp)) return 1; + #endif + + #ifndef STBI_NO_BMP + if (stbi__bmp_info(s, x, y, comp)) return 1; + #endif + + #ifndef STBI_NO_PSD + if (stbi__psd_info(s, x, y, comp)) return 1; + #endif + + #ifndef STBI_NO_PIC + if (stbi__pic_info(s, x, y, comp)) return 1; + #endif + + #ifndef STBI_NO_PNM + if (stbi__pnm_info(s, x, y, comp)) return 1; + #endif + + #ifndef STBI_NO_HDR + if (stbi__hdr_info(s, x, y, comp)) return 1; + #endif + + // test tga last because it's a crappy test! + #ifndef STBI_NO_TGA + if (stbi__tga_info(s, x, y, comp)) + return 1; + #endif + return stbi__err("unknown image type", "Image not of any known type, or corrupt"); +} + +static int stbi__is_16_main(stbi__context *s) +{ + #ifndef STBI_NO_PNG + if (stbi__png_is16(s)) return 1; + #endif + + #ifndef STBI_NO_PSD + if (stbi__psd_is16(s)) return 1; + #endif + + return 0; +} + +#ifndef STBI_NO_STDIO +STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp) +{ + FILE *f = stbi__fopen(filename, "rb"); + int result; + if (!f) return stbi__err("can't fopen", "Unable to open file"); + result = stbi_info_from_file(f, x, y, comp); + fclose(f); + return result; +} + +STBIDEF int stbi_info_from_file(FILE *f, int *x, int *y, int *comp) +{ + int r; + stbi__context s; + long pos = ftell(f); + stbi__start_file(&s, f); + r = stbi__info_main(&s,x,y,comp); + fseek(f,pos,SEEK_SET); + return r; +} + +STBIDEF int stbi_is_16_bit(char const *filename) +{ + FILE *f = stbi__fopen(filename, "rb"); + int result; + if (!f) return stbi__err("can't fopen", "Unable to open file"); + result = stbi_is_16_bit_from_file(f); + fclose(f); + return result; +} + +STBIDEF int stbi_is_16_bit_from_file(FILE *f) +{ + int r; + stbi__context s; + long pos = ftell(f); + stbi__start_file(&s, f); + r = stbi__is_16_main(&s); + fseek(f,pos,SEEK_SET); + return r; +} +#endif // !STBI_NO_STDIO + +STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp) +{ + stbi__context s; + stbi__start_mem(&s,buffer,len); + return stbi__info_main(&s,x,y,comp); +} + +STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp) +{ + stbi__context s; + stbi__start_callbacks(&s, (stbi_io_callbacks *) c, user); + return stbi__info_main(&s,x,y,comp); +} + +STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len) +{ + stbi__context s; + stbi__start_mem(&s,buffer,len); + return stbi__is_16_main(&s); +} + +STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user) +{ + stbi__context s; + stbi__start_callbacks(&s, (stbi_io_callbacks *) c, user); + return stbi__is_16_main(&s); +} + +#endif // STB_IMAGE_IMPLEMENTATION + +/* + revision history: + 2.20 (2019-02-07) support utf8 filenames in Windows; fix warnings and platform ifdefs + 2.19 (2018-02-11) fix warning + 2.18 (2018-01-30) fix warnings + 2.17 (2018-01-29) change sbti__shiftsigned to avoid clang -O2 bug + 1-bit BMP + *_is_16_bit api + avoid warnings + 2.16 (2017-07-23) all functions have 16-bit variants; + STBI_NO_STDIO works again; + compilation fixes; + fix rounding in unpremultiply; + optimize vertical flip; + disable raw_len validation; + documentation fixes + 2.15 (2017-03-18) fix png-1,2,4 bug; now all Imagenet JPGs decode; + warning fixes; disable run-time SSE detection on gcc; + uniform handling of optional "return" values; + thread-safe initialization of zlib tables + 2.14 (2017-03-03) remove deprecated STBI_JPEG_OLD; fixes for Imagenet JPGs + 2.13 (2016-11-29) add 16-bit API, only supported for PNG right now + 2.12 (2016-04-02) fix typo in 2.11 PSD fix that caused crashes + 2.11 (2016-04-02) allocate large structures on the stack + remove white matting for transparent PSD + fix reported channel count for PNG & BMP + re-enable SSE2 in non-gcc 64-bit + support RGB-formatted JPEG + read 16-bit PNGs (only as 8-bit) + 2.10 (2016-01-22) avoid warning introduced in 2.09 by STBI_REALLOC_SIZED + 2.09 (2016-01-16) allow comments in PNM files + 16-bit-per-pixel TGA (not bit-per-component) + info() for TGA could break due to .hdr handling + info() for BMP to shares code instead of sloppy parse + can use STBI_REALLOC_SIZED if allocator doesn't support realloc + code cleanup + 2.08 (2015-09-13) fix to 2.07 cleanup, reading RGB PSD as RGBA + 2.07 (2015-09-13) fix compiler warnings + partial animated GIF support + limited 16-bpc PSD support + #ifdef unused functions + bug with < 92 byte PIC,PNM,HDR,TGA + 2.06 (2015-04-19) fix bug where PSD returns wrong '*comp' value + 2.05 (2015-04-19) fix bug in progressive JPEG handling, fix warning + 2.04 (2015-04-15) try to re-enable SIMD on MinGW 64-bit + 2.03 (2015-04-12) extra corruption checking (mmozeiko) + stbi_set_flip_vertically_on_load (nguillemot) + fix NEON support; fix mingw support + 2.02 (2015-01-19) fix incorrect assert, fix warning + 2.01 (2015-01-17) fix various warnings; suppress SIMD on gcc 32-bit without -msse2 + 2.00b (2014-12-25) fix STBI_MALLOC in progressive JPEG + 2.00 (2014-12-25) optimize JPG, including x86 SSE2 & NEON SIMD (ryg) + progressive JPEG (stb) + PGM/PPM support (Ken Miller) + STBI_MALLOC,STBI_REALLOC,STBI_FREE + GIF bugfix -- seemingly never worked + STBI_NO_*, STBI_ONLY_* + 1.48 (2014-12-14) fix incorrectly-named assert() + 1.47 (2014-12-14) 1/2/4-bit PNG support, both direct and paletted (Omar Cornut & stb) + optimize PNG (ryg) + fix bug in interlaced PNG with user-specified channel count (stb) + 1.46 (2014-08-26) + fix broken tRNS chunk (colorkey-style transparency) in non-paletted PNG + 1.45 (2014-08-16) + fix MSVC-ARM internal compiler error by wrapping malloc + 1.44 (2014-08-07) + various warning fixes from Ronny Chevalier + 1.43 (2014-07-15) + fix MSVC-only compiler problem in code changed in 1.42 + 1.42 (2014-07-09) + don't define _CRT_SECURE_NO_WARNINGS (affects user code) + fixes to stbi__cleanup_jpeg path + added STBI_ASSERT to avoid requiring assert.h + 1.41 (2014-06-25) + fix search&replace from 1.36 that messed up comments/error messages + 1.40 (2014-06-22) + fix gcc struct-initialization warning + 1.39 (2014-06-15) + fix to TGA optimization when req_comp != number of components in TGA; + fix to GIF loading because BMP wasn't rewinding (whoops, no GIFs in my test suite) + add support for BMP version 5 (more ignored fields) + 1.38 (2014-06-06) + suppress MSVC warnings on integer casts truncating values + fix accidental rename of 'skip' field of I/O + 1.37 (2014-06-04) + remove duplicate typedef + 1.36 (2014-06-03) + convert to header file single-file library + if de-iphone isn't set, load iphone images color-swapped instead of returning NULL + 1.35 (2014-05-27) + various warnings + fix broken STBI_SIMD path + fix bug where stbi_load_from_file no longer left file pointer in correct place + fix broken non-easy path for 32-bit BMP (possibly never used) + TGA optimization by Arseny Kapoulkine + 1.34 (unknown) + use STBI_NOTUSED in stbi__resample_row_generic(), fix one more leak in tga failure case + 1.33 (2011-07-14) + make stbi_is_hdr work in STBI_NO_HDR (as specified), minor compiler-friendly improvements + 1.32 (2011-07-13) + support for "info" function for all supported filetypes (SpartanJ) + 1.31 (2011-06-20) + a few more leak fixes, bug in PNG handling (SpartanJ) + 1.30 (2011-06-11) + added ability to load files via callbacks to accomidate custom input streams (Ben Wenger) + removed deprecated format-specific test/load functions + removed support for installable file formats (stbi_loader) -- would have been broken for IO callbacks anyway + error cases in bmp and tga give messages and don't leak (Raymond Barbiero, grisha) + fix inefficiency in decoding 32-bit BMP (David Woo) + 1.29 (2010-08-16) + various warning fixes from Aurelien Pocheville + 1.28 (2010-08-01) + fix bug in GIF palette transparency (SpartanJ) + 1.27 (2010-08-01) + cast-to-stbi_uc to fix warnings + 1.26 (2010-07-24) + fix bug in file buffering for PNG reported by SpartanJ + 1.25 (2010-07-17) + refix trans_data warning (Won Chun) + 1.24 (2010-07-12) + perf improvements reading from files on platforms with lock-heavy fgetc() + minor perf improvements for jpeg + deprecated type-specific functions so we'll get feedback if they're needed + attempt to fix trans_data warning (Won Chun) + 1.23 fixed bug in iPhone support + 1.22 (2010-07-10) + removed image *writing* support + stbi_info support from Jetro Lauha + GIF support from Jean-Marc Lienher + iPhone PNG-extensions from James Brown + warning-fixes from Nicolas Schulz and Janez Zemva (i.stbi__err. Janez (U+017D)emva) + 1.21 fix use of 'stbi_uc' in header (reported by jon blow) + 1.20 added support for Softimage PIC, by Tom Seddon + 1.19 bug in interlaced PNG corruption check (found by ryg) + 1.18 (2008-08-02) + fix a threading bug (local mutable static) + 1.17 support interlaced PNG + 1.16 major bugfix - stbi__convert_format converted one too many pixels + 1.15 initialize some fields for thread safety + 1.14 fix threadsafe conversion bug + header-file-only version (#define STBI_HEADER_FILE_ONLY before including) + 1.13 threadsafe + 1.12 const qualifiers in the API + 1.11 Support installable IDCT, colorspace conversion routines + 1.10 Fixes for 64-bit (don't use "unsigned long") + optimized upsampling by Fabian "ryg" Giesen + 1.09 Fix format-conversion for PSD code (bad global variables!) + 1.08 Thatcher Ulrich's PSD code integrated by Nicolas Schulz + 1.07 attempt to fix C++ warning/errors again + 1.06 attempt to fix C++ warning/errors again + 1.05 fix TGA loading to return correct *comp and use good luminance calc + 1.04 default float alpha is 1, not 255; use 'void *' for stbi_image_free + 1.03 bugfixes to STBI_NO_STDIO, STBI_NO_HDR + 1.02 support for (subset of) HDR files, float interface for preferred access to them + 1.01 fix bug: possible bug in handling right-side up bmps... not sure + fix bug: the stbi__bmp_load() and stbi__tga_load() functions didn't work at all + 1.00 interface to zlib that skips zlib header + 0.99 correct handling of alpha in palette + 0.98 TGA loader by lonesock; dynamically add loaders (untested) + 0.97 jpeg errors on too large a file; also catch another malloc failure + 0.96 fix detection of invalid v value - particleman@mollyrocket forum + 0.95 during header scan, seek to markers in case of padding + 0.94 STBI_NO_STDIO to disable stdio usage; rename all #defines the same + 0.93 handle jpegtran output; verbose errors + 0.92 read 4,8,16,24,32-bit BMP files of several formats + 0.91 output 24-bit Windows 3.0 BMP files + 0.90 fix a few more warnings; bump version number to approach 1.0 + 0.61 bugfixes due to Marc LeBlanc, Christopher Lloyd + 0.60 fix compiling as c++ + 0.59 fix warnings: merge Dave Moore's -Wall fixes + 0.58 fix bug: zlib uncompressed mode len/nlen was wrong endian + 0.57 fix bug: jpg last huffman symbol before marker was >9 bits but less than 16 available + 0.56 fix bug: zlib uncompressed mode len vs. nlen + 0.55 fix bug: restart_interval not initialized to 0 + 0.54 allow NULL for 'int *comp' + 0.53 fix bug in png 3->4; speedup png decoding + 0.52 png handles req_comp=3,4 directly; minor cleanup; jpeg comments + 0.51 obey req_comp requests, 1-component jpegs return as 1-component, + on 'test' only check type, not whether we support this variant + 0.50 (2006-11-19) + first released version +*/ + + +/* +------------------------------------------------------------------------------ +This software is available under 2 licenses -- choose whichever you prefer. +------------------------------------------------------------------------------ +ALTERNATIVE A - MIT License +Copyright (c) 2017 Sean Barrett +Permission is hereby granted, free of charge, to any person obtaining a copy of +this software and associated documentation files (the "Software"), to deal in +the Software without restriction, including without limitation the rights to +use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies +of the Software, and to permit persons to whom the Software is furnished to do +so, subject to the following conditions: +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. +------------------------------------------------------------------------------ +ALTERNATIVE B - Public Domain (www.unlicense.org) +This is free and unencumbered software released into the public domain. +Anyone is free to copy, modify, publish, use, compile, sell, or distribute this +software, either in source code form or as a compiled binary, for any purpose, +commercial or non-commercial, and by any means. +In jurisdictions that recognize copyright laws, the author or authors of this +software dedicate any and all copyright interest in the software to the public +domain. We make this dedication for the benefit of the public at large and to +the detriment of our heirs and successors. We intend this dedication to be an +overt act of relinquishment in perpetuity of all present and future rights to +this software under copyright law. +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION +WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. +------------------------------------------------------------------------------ +*/ \ No newline at end of file diff --git a/third-party/tiny_gltf/stb_image_write.h b/third-party/tiny_gltf/stb_image_write.h new file mode 100644 index 0000000000..c1e4f3479a --- /dev/null +++ b/third-party/tiny_gltf/stb_image_write.h @@ -0,0 +1,1621 @@ +/* stb_image_write - v1.11 - public domain - http://nothings.org/stb/stb_image_write.h + writes out PNG/BMP/TGA/JPEG/HDR images to C stdio - Sean Barrett 2010-2015 + no warranty implied; use at your own risk + + Before #including, + + #define STB_IMAGE_WRITE_IMPLEMENTATION + + in the file that you want to have the implementation. + + Will probably not work correctly with strict-aliasing optimizations. + + If using a modern Microsoft Compiler, non-safe versions of CRT calls may cause + compilation warnings or even errors. To avoid this, also before #including, + + #define STBI_MSC_SECURE_CRT + +ABOUT: + + This header file is a library for writing images to C stdio or a callback. + + The PNG output is not optimal; it is 20-50% larger than the file + written by a decent optimizing implementation; though providing a custom + zlib compress function (see STBIW_ZLIB_COMPRESS) can mitigate that. + This library is designed for source code compactness and simplicity, + not optimal image file size or run-time performance. + +BUILDING: + + You can #define STBIW_ASSERT(x) before the #include to avoid using assert.h. + You can #define STBIW_MALLOC(), STBIW_REALLOC(), and STBIW_FREE() to replace + malloc,realloc,free. + You can #define STBIW_MEMMOVE() to replace memmove() + You can #define STBIW_ZLIB_COMPRESS to use a custom zlib-style compress function + for PNG compression (instead of the builtin one), it must have the following signature: + unsigned char * my_compress(unsigned char *data, int data_len, int *out_len, int quality); + The returned data will be freed with STBIW_FREE() (free() by default), + so it must be heap allocated with STBIW_MALLOC() (malloc() by default), + +UNICODE: + + If compiling for Windows and you wish to use Unicode filenames, compile + with + #define STBIW_WINDOWS_UTF8 + and pass utf8-encoded filenames. Call stbiw_convert_wchar_to_utf8 to convert + Windows wchar_t filenames to utf8. + +USAGE: + + There are five functions, one for each image file format: + + int stbi_write_png(char const *filename, int w, int h, int comp, const void *data, int stride_in_bytes); + int stbi_write_bmp(char const *filename, int w, int h, int comp, const void *data); + int stbi_write_tga(char const *filename, int w, int h, int comp, const void *data); + int stbi_write_jpg(char const *filename, int w, int h, int comp, const void *data, int quality); + int stbi_write_hdr(char const *filename, int w, int h, int comp, const float *data); + + void stbi_flip_vertically_on_write(int flag); // flag is non-zero to flip data vertically + + There are also five equivalent functions that use an arbitrary write function. You are + expected to open/close your file-equivalent before and after calling these: + + int stbi_write_png_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const void *data, int stride_in_bytes); + int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const void *data); + int stbi_write_tga_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const void *data); + int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const float *data); + int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality); + + where the callback is: + void stbi_write_func(void *context, void *data, int size); + + You can configure it with these global variables: + int stbi_write_tga_with_rle; // defaults to true; set to 0 to disable RLE + int stbi_write_png_compression_level; // defaults to 8; set to higher for more compression + int stbi_write_force_png_filter; // defaults to -1; set to 0..5 to force a filter mode + + + You can define STBI_WRITE_NO_STDIO to disable the file variant of these + functions, so the library will not use stdio.h at all. However, this will + also disable HDR writing, because it requires stdio for formatted output. + + Each function returns 0 on failure and non-0 on success. + + The functions create an image file defined by the parameters. The image + is a rectangle of pixels stored from left-to-right, top-to-bottom. + Each pixel contains 'comp' channels of data stored interleaved with 8-bits + per channel, in the following order: 1=Y, 2=YA, 3=RGB, 4=RGBA. (Y is + monochrome color.) The rectangle is 'w' pixels wide and 'h' pixels tall. + The *data pointer points to the first byte of the top-left-most pixel. + For PNG, "stride_in_bytes" is the distance in bytes from the first byte of + a row of pixels to the first byte of the next row of pixels. + + PNG creates output files with the same number of components as the input. + The BMP format expands Y to RGB in the file format and does not + output alpha. + + PNG supports writing rectangles of data even when the bytes storing rows of + data are not consecutive in memory (e.g. sub-rectangles of a larger image), + by supplying the stride between the beginning of adjacent rows. The other + formats do not. (Thus you cannot write a native-format BMP through the BMP + writer, both because it is in BGR order and because it may have padding + at the end of the line.) + + PNG allows you to set the deflate compression level by setting the global + variable 'stbi_write_png_compression_level' (it defaults to 8). + + HDR expects linear float data. Since the format is always 32-bit rgb(e) + data, alpha (if provided) is discarded, and for monochrome data it is + replicated across all three channels. + + TGA supports RLE or non-RLE compressed data. To use non-RLE-compressed + data, set the global variable 'stbi_write_tga_with_rle' to 0. + + JPEG does ignore alpha channels in input data; quality is between 1 and 100. + Higher quality looks better but results in a bigger image. + JPEG baseline (no JPEG progressive). + +CREDITS: + + + Sean Barrett - PNG/BMP/TGA + Baldur Karlsson - HDR + Jean-Sebastien Guay - TGA monochrome + Tim Kelsey - misc enhancements + Alan Hickman - TGA RLE + Emmanuel Julien - initial file IO callback implementation + Jon Olick - original jo_jpeg.cpp code + Daniel Gibson - integrate JPEG, allow external zlib + Aarni Koskela - allow choosing PNG filter + + bugfixes: + github:Chribba + Guillaume Chereau + github:jry2 + github:romigrou + Sergio Gonzalez + Jonas Karlsson + Filip Wasil + Thatcher Ulrich + github:poppolopoppo + Patrick Boettcher + github:xeekworx + Cap Petschulat + Simon Rodriguez + Ivan Tikhonov + github:ignotion + Adam Schackart + +LICENSE + + See end of file for license information. + +*/ + +#ifndef INCLUDE_STB_IMAGE_WRITE_H +#define INCLUDE_STB_IMAGE_WRITE_H + +#include + +// if STB_IMAGE_WRITE_STATIC causes problems, try defining STBIWDEF to 'inline' or 'static inline' +#ifndef STBIWDEF +#ifdef STB_IMAGE_WRITE_STATIC +#define STBIWDEF static +#else +#ifdef __cplusplus +#define STBIWDEF extern "C" +#else +#define STBIWDEF extern +#endif +#endif +#endif + +#ifndef STB_IMAGE_WRITE_STATIC // C++ forbids static forward declarations +extern int stbi_write_tga_with_rle; +extern int stbi_write_png_compression_level; +extern int stbi_write_force_png_filter; +#endif + +#ifndef STBI_WRITE_NO_STDIO +STBIWDEF int stbi_write_png(char const *filename, int w, int h, int comp, const void *data, int stride_in_bytes); +STBIWDEF int stbi_write_bmp(char const *filename, int w, int h, int comp, const void *data); +STBIWDEF int stbi_write_tga(char const *filename, int w, int h, int comp, const void *data); +STBIWDEF int stbi_write_hdr(char const *filename, int w, int h, int comp, const float *data); +STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality); + +#ifdef STBI_WINDOWS_UTF8 +STBIWDEF int stbiw_convert_wchar_to_utf8(char *buffer, size_t bufferlen, const wchar_t* input); +#endif +#endif + +typedef void stbi_write_func(void *context, void *data, int size); + +STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const void *data, int stride_in_bytes); +STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const void *data); +STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const void *data); +STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const float *data); +STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality); + +STBIWDEF void stbi_flip_vertically_on_write(int flip_boolean); + +#endif//INCLUDE_STB_IMAGE_WRITE_H + +#ifdef STB_IMAGE_WRITE_IMPLEMENTATION + +#ifdef _WIN32 + #ifndef _CRT_SECURE_NO_WARNINGS + #define _CRT_SECURE_NO_WARNINGS + #endif + #ifndef _CRT_NONSTDC_NO_DEPRECATE + #define _CRT_NONSTDC_NO_DEPRECATE + #endif +#endif + +#ifndef STBI_WRITE_NO_STDIO +#include +#endif // STBI_WRITE_NO_STDIO + +#include +#include +#include +#include + +#if defined(STBIW_MALLOC) && defined(STBIW_FREE) && (defined(STBIW_REALLOC) || defined(STBIW_REALLOC_SIZED)) +// ok +#elif !defined(STBIW_MALLOC) && !defined(STBIW_FREE) && !defined(STBIW_REALLOC) && !defined(STBIW_REALLOC_SIZED) +// ok +#else +#error "Must define all or none of STBIW_MALLOC, STBIW_FREE, and STBIW_REALLOC (or STBIW_REALLOC_SIZED)." +#endif + +#ifndef STBIW_MALLOC +#define STBIW_MALLOC(sz) malloc(sz) +#define STBIW_REALLOC(p,newsz) realloc(p,newsz) +#define STBIW_FREE(p) free(p) +#endif + +#ifndef STBIW_REALLOC_SIZED +#define STBIW_REALLOC_SIZED(p,oldsz,newsz) STBIW_REALLOC(p,newsz) +#endif + + +#ifndef STBIW_MEMMOVE +#define STBIW_MEMMOVE(a,b,sz) memmove(a,b,sz) +#endif + + +#ifndef STBIW_ASSERT +#include +#define STBIW_ASSERT(x) assert(x) +#endif + +#define STBIW_UCHAR(x) (unsigned char) ((x) & 0xff) + +#ifdef STB_IMAGE_WRITE_STATIC +static int stbi__flip_vertically_on_write=0; +static int stbi_write_png_compression_level = 8; +static int stbi_write_tga_with_rle = 1; +static int stbi_write_force_png_filter = -1; +#else +int stbi_write_png_compression_level = 8; +int stbi__flip_vertically_on_write=0; +int stbi_write_tga_with_rle = 1; +int stbi_write_force_png_filter = -1; +#endif + +STBIWDEF void stbi_flip_vertically_on_write(int flag) +{ + stbi__flip_vertically_on_write = flag; +} + +typedef struct +{ + stbi_write_func *func; + void *context; +} stbi__write_context; + +// initialize a callback-based context +static void stbi__start_write_callbacks(stbi__write_context *s, stbi_write_func *c, void *context) +{ + s->func = c; + s->context = context; +} + +#ifndef STBI_WRITE_NO_STDIO + +static void stbi__stdio_write(void *context, void *data, int size) +{ + fwrite(data,1,size,(FILE*) context); +} + +#if defined(_MSC_VER) && defined(STBI_WINDOWS_UTF8) +#ifdef __cplusplus +#define STBIW_EXTERN extern "C" +#else +#define STBIW_EXTERN extern +#endif +STBIW_EXTERN __declspec(dllimport) int __stdcall MultiByteToWideChar(unsigned int cp, unsigned long flags, const char *str, int cbmb, wchar_t *widestr, int cchwide); +STBIW_EXTERN __declspec(dllimport) int __stdcall WideCharToMultiByte(unsigned int cp, unsigned long flags, const wchar_t *widestr, int cchwide, char *str, int cbmb, const char *defchar, int *used_default); + +STBIWDEF int stbiw_convert_wchar_to_utf8(char *buffer, size_t bufferlen, const wchar_t* input) +{ + return WideCharToMultiByte(65001 /* UTF8 */, 0, input, -1, buffer, bufferlen, NULL, NULL); +} +#endif + +static FILE *stbiw__fopen(char const *filename, char const *mode) +{ + FILE *f; +#if defined(_MSC_VER) && defined(STBI_WINDOWS_UTF8) + wchar_t wMode[64]; + wchar_t wFilename[1024]; + if (0 == MultiByteToWideChar(65001 /* UTF8 */, 0, filename, -1, wFilename, sizeof(wFilename))) + return 0; + + if (0 == MultiByteToWideChar(65001 /* UTF8 */, 0, mode, -1, wMode, sizeof(wMode))) + return 0; + +#if _MSC_VER >= 1400 + if (0 != _wfopen_s(&f, wFilename, wMode)) + f = 0; +#else + f = _wfopen(wFilename, wMode); +#endif + +#elif defined(_MSC_VER) && _MSC_VER >= 1400 + if (0 != fopen_s(&f, filename, mode)) + f=0; +#else + f = fopen(filename, mode); +#endif + return f; +} + +static int stbi__start_write_file(stbi__write_context *s, const char *filename) +{ + FILE *f = stbiw__fopen(filename, "wb"); + stbi__start_write_callbacks(s, stbi__stdio_write, (void *) f); + return f != NULL; +} + +static void stbi__end_write_file(stbi__write_context *s) +{ + fclose((FILE *)s->context); +} + +#endif // !STBI_WRITE_NO_STDIO + +typedef unsigned int stbiw_uint32; +typedef int stb_image_write_test[sizeof(stbiw_uint32)==4 ? 1 : -1]; + +static void stbiw__writefv(stbi__write_context *s, const char *fmt, va_list v) +{ + while (*fmt) { + switch (*fmt++) { + case ' ': break; + case '1': { unsigned char x = STBIW_UCHAR(va_arg(v, int)); + s->func(s->context,&x,1); + break; } + case '2': { int x = va_arg(v,int); + unsigned char b[2]; + b[0] = STBIW_UCHAR(x); + b[1] = STBIW_UCHAR(x>>8); + s->func(s->context,b,2); + break; } + case '4': { stbiw_uint32 x = va_arg(v,int); + unsigned char b[4]; + b[0]=STBIW_UCHAR(x); + b[1]=STBIW_UCHAR(x>>8); + b[2]=STBIW_UCHAR(x>>16); + b[3]=STBIW_UCHAR(x>>24); + s->func(s->context,b,4); + break; } + default: + STBIW_ASSERT(0); + return; + } + } +} + +static void stbiw__writef(stbi__write_context *s, const char *fmt, ...) +{ + va_list v; + va_start(v, fmt); + stbiw__writefv(s, fmt, v); + va_end(v); +} + +static void stbiw__putc(stbi__write_context *s, unsigned char c) +{ + s->func(s->context, &c, 1); +} + +static void stbiw__write3(stbi__write_context *s, unsigned char a, unsigned char b, unsigned char c) +{ + unsigned char arr[3]; + arr[0] = a, arr[1] = b, arr[2] = c; + s->func(s->context, arr, 3); +} + +static void stbiw__write_pixel(stbi__write_context *s, int rgb_dir, int comp, int write_alpha, int expand_mono, unsigned char *d) +{ + unsigned char bg[3] = { 255, 0, 255}, px[3]; + int k; + + if (write_alpha < 0) + s->func(s->context, &d[comp - 1], 1); + + switch (comp) { + case 2: // 2 pixels = mono + alpha, alpha is written separately, so same as 1-channel case + case 1: + if (expand_mono) + stbiw__write3(s, d[0], d[0], d[0]); // monochrome bmp + else + s->func(s->context, d, 1); // monochrome TGA + break; + case 4: + if (!write_alpha) { + // composite against pink background + for (k = 0; k < 3; ++k) + px[k] = bg[k] + ((d[k] - bg[k]) * d[3]) / 255; + stbiw__write3(s, px[1 - rgb_dir], px[1], px[1 + rgb_dir]); + break; + } + /* FALLTHROUGH */ + case 3: + stbiw__write3(s, d[1 - rgb_dir], d[1], d[1 + rgb_dir]); + break; + } + if (write_alpha > 0) + s->func(s->context, &d[comp - 1], 1); +} + +static void stbiw__write_pixels(stbi__write_context *s, int rgb_dir, int vdir, int x, int y, int comp, void *data, int write_alpha, int scanline_pad, int expand_mono) +{ + stbiw_uint32 zero = 0; + int i,j, j_end; + + if (y <= 0) + return; + + if (stbi__flip_vertically_on_write) + vdir *= -1; + + if (vdir < 0) + j_end = -1, j = y-1; + else + j_end = y, j = 0; + + for (; j != j_end; j += vdir) { + for (i=0; i < x; ++i) { + unsigned char *d = (unsigned char *) data + (j*x+i)*comp; + stbiw__write_pixel(s, rgb_dir, comp, write_alpha, expand_mono, d); + } + s->func(s->context, &zero, scanline_pad); + } +} + +static int stbiw__outfile(stbi__write_context *s, int rgb_dir, int vdir, int x, int y, int comp, int expand_mono, void *data, int alpha, int pad, const char *fmt, ...) +{ + if (y < 0 || x < 0) { + return 0; + } else { + va_list v; + va_start(v, fmt); + stbiw__writefv(s, fmt, v); + va_end(v); + stbiw__write_pixels(s,rgb_dir,vdir,x,y,comp,data,alpha,pad, expand_mono); + return 1; + } +} + +static int stbi_write_bmp_core(stbi__write_context *s, int x, int y, int comp, const void *data) +{ + int pad = (-x*3) & 3; + return stbiw__outfile(s,-1,-1,x,y,comp,1,(void *) data,0,pad, + "11 4 22 4" "4 44 22 444444", + 'B', 'M', 14+40+(x*3+pad)*y, 0,0, 14+40, // file header + 40, x,y, 1,24, 0,0,0,0,0,0); // bitmap header +} + +STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data) +{ + stbi__write_context s; + stbi__start_write_callbacks(&s, func, context); + return stbi_write_bmp_core(&s, x, y, comp, data); +} + +#ifndef STBI_WRITE_NO_STDIO +STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data) +{ + stbi__write_context s; + if (stbi__start_write_file(&s,filename)) { + int r = stbi_write_bmp_core(&s, x, y, comp, data); + stbi__end_write_file(&s); + return r; + } else + return 0; +} +#endif //!STBI_WRITE_NO_STDIO + +static int stbi_write_tga_core(stbi__write_context *s, int x, int y, int comp, void *data) +{ + int has_alpha = (comp == 2 || comp == 4); + int colorbytes = has_alpha ? comp-1 : comp; + int format = colorbytes < 2 ? 3 : 2; // 3 color channels (RGB/RGBA) = 2, 1 color channel (Y/YA) = 3 + + if (y < 0 || x < 0) + return 0; + + if (!stbi_write_tga_with_rle) { + return stbiw__outfile(s, -1, -1, x, y, comp, 0, (void *) data, has_alpha, 0, + "111 221 2222 11", 0, 0, format, 0, 0, 0, 0, 0, x, y, (colorbytes + has_alpha) * 8, has_alpha * 8); + } else { + int i,j,k; + int jend, jdir; + + stbiw__writef(s, "111 221 2222 11", 0,0,format+8, 0,0,0, 0,0,x,y, (colorbytes + has_alpha) * 8, has_alpha * 8); + + if (stbi__flip_vertically_on_write) { + j = 0; + jend = y; + jdir = 1; + } else { + j = y-1; + jend = -1; + jdir = -1; + } + for (; j != jend; j += jdir) { + unsigned char *row = (unsigned char *) data + j * x * comp; + int len; + + for (i = 0; i < x; i += len) { + unsigned char *begin = row + i * comp; + int diff = 1; + len = 1; + + if (i < x - 1) { + ++len; + diff = memcmp(begin, row + (i + 1) * comp, comp); + if (diff) { + const unsigned char *prev = begin; + for (k = i + 2; k < x && len < 128; ++k) { + if (memcmp(prev, row + k * comp, comp)) { + prev += comp; + ++len; + } else { + --len; + break; + } + } + } else { + for (k = i + 2; k < x && len < 128; ++k) { + if (!memcmp(begin, row + k * comp, comp)) { + ++len; + } else { + break; + } + } + } + } + + if (diff) { + unsigned char header = STBIW_UCHAR(len - 1); + s->func(s->context, &header, 1); + for (k = 0; k < len; ++k) { + stbiw__write_pixel(s, -1, comp, has_alpha, 0, begin + k * comp); + } + } else { + unsigned char header = STBIW_UCHAR(len - 129); + s->func(s->context, &header, 1); + stbiw__write_pixel(s, -1, comp, has_alpha, 0, begin); + } + } + } + } + return 1; +} + +STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data) +{ + stbi__write_context s; + stbi__start_write_callbacks(&s, func, context); + return stbi_write_tga_core(&s, x, y, comp, (void *) data); +} + +#ifndef STBI_WRITE_NO_STDIO +STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data) +{ + stbi__write_context s; + if (stbi__start_write_file(&s,filename)) { + int r = stbi_write_tga_core(&s, x, y, comp, (void *) data); + stbi__end_write_file(&s); + return r; + } else + return 0; +} +#endif + +// ************************************************************************************************* +// Radiance RGBE HDR writer +// by Baldur Karlsson + +#define stbiw__max(a, b) ((a) > (b) ? (a) : (b)) + +static void stbiw__linear_to_rgbe(unsigned char *rgbe, float *linear) +{ + int exponent; + float maxcomp = stbiw__max(linear[0], stbiw__max(linear[1], linear[2])); + + if (maxcomp < 1e-32f) { + rgbe[0] = rgbe[1] = rgbe[2] = rgbe[3] = 0; + } else { + float normalize = (float) frexp(maxcomp, &exponent) * 256.0f/maxcomp; + + rgbe[0] = (unsigned char)(linear[0] * normalize); + rgbe[1] = (unsigned char)(linear[1] * normalize); + rgbe[2] = (unsigned char)(linear[2] * normalize); + rgbe[3] = (unsigned char)(exponent + 128); + } +} + +static void stbiw__write_run_data(stbi__write_context *s, int length, unsigned char databyte) +{ + unsigned char lengthbyte = STBIW_UCHAR(length+128); + STBIW_ASSERT(length+128 <= 255); + s->func(s->context, &lengthbyte, 1); + s->func(s->context, &databyte, 1); +} + +static void stbiw__write_dump_data(stbi__write_context *s, int length, unsigned char *data) +{ + unsigned char lengthbyte = STBIW_UCHAR(length); + STBIW_ASSERT(length <= 128); // inconsistent with spec but consistent with official code + s->func(s->context, &lengthbyte, 1); + s->func(s->context, data, length); +} + +static void stbiw__write_hdr_scanline(stbi__write_context *s, int width, int ncomp, unsigned char *scratch, float *scanline) +{ + unsigned char scanlineheader[4] = { 2, 2, 0, 0 }; + unsigned char rgbe[4]; + float linear[3]; + int x; + + scanlineheader[2] = (width&0xff00)>>8; + scanlineheader[3] = (width&0x00ff); + + /* skip RLE for images too small or large */ + if (width < 8 || width >= 32768) { + for (x=0; x < width; x++) { + switch (ncomp) { + case 4: /* fallthrough */ + case 3: linear[2] = scanline[x*ncomp + 2]; + linear[1] = scanline[x*ncomp + 1]; + linear[0] = scanline[x*ncomp + 0]; + break; + default: + linear[0] = linear[1] = linear[2] = scanline[x*ncomp + 0]; + break; + } + stbiw__linear_to_rgbe(rgbe, linear); + s->func(s->context, rgbe, 4); + } + } else { + int c,r; + /* encode into scratch buffer */ + for (x=0; x < width; x++) { + switch(ncomp) { + case 4: /* fallthrough */ + case 3: linear[2] = scanline[x*ncomp + 2]; + linear[1] = scanline[x*ncomp + 1]; + linear[0] = scanline[x*ncomp + 0]; + break; + default: + linear[0] = linear[1] = linear[2] = scanline[x*ncomp + 0]; + break; + } + stbiw__linear_to_rgbe(rgbe, linear); + scratch[x + width*0] = rgbe[0]; + scratch[x + width*1] = rgbe[1]; + scratch[x + width*2] = rgbe[2]; + scratch[x + width*3] = rgbe[3]; + } + + s->func(s->context, scanlineheader, 4); + + /* RLE each component separately */ + for (c=0; c < 4; c++) { + unsigned char *comp = &scratch[width*c]; + + x = 0; + while (x < width) { + // find first run + r = x; + while (r+2 < width) { + if (comp[r] == comp[r+1] && comp[r] == comp[r+2]) + break; + ++r; + } + if (r+2 >= width) + r = width; + // dump up to first run + while (x < r) { + int len = r-x; + if (len > 128) len = 128; + stbiw__write_dump_data(s, len, &comp[x]); + x += len; + } + // if there's a run, output it + if (r+2 < width) { // same test as what we break out of in search loop, so only true if we break'd + // find next byte after run + while (r < width && comp[r] == comp[x]) + ++r; + // output run up to r + while (x < r) { + int len = r-x; + if (len > 127) len = 127; + stbiw__write_run_data(s, len, comp[x]); + x += len; + } + } + } + } + } +} + +static int stbi_write_hdr_core(stbi__write_context *s, int x, int y, int comp, float *data) +{ + if (y <= 0 || x <= 0 || data == NULL) + return 0; + else { + // Each component is stored separately. Allocate scratch space for full output scanline. + unsigned char *scratch = (unsigned char *) STBIW_MALLOC(x*4); + int i, len; + char buffer[128]; + char header[] = "#?RADIANCE\n# Written by stb_image_write.h\nFORMAT=32-bit_rle_rgbe\n"; + s->func(s->context, header, sizeof(header)-1); + +#ifdef STBI_MSC_SECURE_CRT + len = sprintf_s(buffer, "EXPOSURE= 1.0000000000000\n\n-Y %d +X %d\n", y, x); +#else + len = sprintf(buffer, "EXPOSURE= 1.0000000000000\n\n-Y %d +X %d\n", y, x); +#endif + s->func(s->context, buffer, len); + + for(i=0; i < y; i++) + stbiw__write_hdr_scanline(s, x, comp, scratch, data + comp*x*(stbi__flip_vertically_on_write ? y-1-i : i)); + STBIW_FREE(scratch); + return 1; + } +} + +STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data) +{ + stbi__write_context s; + stbi__start_write_callbacks(&s, func, context); + return stbi_write_hdr_core(&s, x, y, comp, (float *) data); +} + +#ifndef STBI_WRITE_NO_STDIO +STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data) +{ + stbi__write_context s; + if (stbi__start_write_file(&s,filename)) { + int r = stbi_write_hdr_core(&s, x, y, comp, (float *) data); + stbi__end_write_file(&s); + return r; + } else + return 0; +} +#endif // STBI_WRITE_NO_STDIO + + +////////////////////////////////////////////////////////////////////////////// +// +// PNG writer +// + +#ifndef STBIW_ZLIB_COMPRESS +// stretchy buffer; stbiw__sbpush() == vector<>::push_back() -- stbiw__sbcount() == vector<>::size() +#define stbiw__sbraw(a) ((int *) (a) - 2) +#define stbiw__sbm(a) stbiw__sbraw(a)[0] +#define stbiw__sbn(a) stbiw__sbraw(a)[1] + +#define stbiw__sbneedgrow(a,n) ((a)==0 || stbiw__sbn(a)+n >= stbiw__sbm(a)) +#define stbiw__sbmaybegrow(a,n) (stbiw__sbneedgrow(a,(n)) ? stbiw__sbgrow(a,n) : 0) +#define stbiw__sbgrow(a,n) stbiw__sbgrowf((void **) &(a), (n), sizeof(*(a))) + +#define stbiw__sbpush(a, v) (stbiw__sbmaybegrow(a,1), (a)[stbiw__sbn(a)++] = (v)) +#define stbiw__sbcount(a) ((a) ? stbiw__sbn(a) : 0) +#define stbiw__sbfree(a) ((a) ? STBIW_FREE(stbiw__sbraw(a)),0 : 0) + +static void *stbiw__sbgrowf(void **arr, int increment, int itemsize) +{ + int m = *arr ? 2*stbiw__sbm(*arr)+increment : increment+1; + void *p = STBIW_REALLOC_SIZED(*arr ? stbiw__sbraw(*arr) : 0, *arr ? (stbiw__sbm(*arr)*itemsize + sizeof(int)*2) : 0, itemsize * m + sizeof(int)*2); + STBIW_ASSERT(p); + if (p) { + if (!*arr) ((int *) p)[1] = 0; + *arr = (void *) ((int *) p + 2); + stbiw__sbm(*arr) = m; + } + return *arr; +} + +static unsigned char *stbiw__zlib_flushf(unsigned char *data, unsigned int *bitbuffer, int *bitcount) +{ + while (*bitcount >= 8) { + stbiw__sbpush(data, STBIW_UCHAR(*bitbuffer)); + *bitbuffer >>= 8; + *bitcount -= 8; + } + return data; +} + +static int stbiw__zlib_bitrev(int code, int codebits) +{ + int res=0; + while (codebits--) { + res = (res << 1) | (code & 1); + code >>= 1; + } + return res; +} + +static unsigned int stbiw__zlib_countm(unsigned char *a, unsigned char *b, int limit) +{ + int i; + for (i=0; i < limit && i < 258; ++i) + if (a[i] != b[i]) break; + return i; +} + +static unsigned int stbiw__zhash(unsigned char *data) +{ + stbiw_uint32 hash = data[0] + (data[1] << 8) + (data[2] << 16); + hash ^= hash << 3; + hash += hash >> 5; + hash ^= hash << 4; + hash += hash >> 17; + hash ^= hash << 25; + hash += hash >> 6; + return hash; +} + +#define stbiw__zlib_flush() (out = stbiw__zlib_flushf(out, &bitbuf, &bitcount)) +#define stbiw__zlib_add(code,codebits) \ + (bitbuf |= (code) << bitcount, bitcount += (codebits), stbiw__zlib_flush()) +#define stbiw__zlib_huffa(b,c) stbiw__zlib_add(stbiw__zlib_bitrev(b,c),c) +// default huffman tables +#define stbiw__zlib_huff1(n) stbiw__zlib_huffa(0x30 + (n), 8) +#define stbiw__zlib_huff2(n) stbiw__zlib_huffa(0x190 + (n)-144, 9) +#define stbiw__zlib_huff3(n) stbiw__zlib_huffa(0 + (n)-256,7) +#define stbiw__zlib_huff4(n) stbiw__zlib_huffa(0xc0 + (n)-280,8) +#define stbiw__zlib_huff(n) ((n) <= 143 ? stbiw__zlib_huff1(n) : (n) <= 255 ? stbiw__zlib_huff2(n) : (n) <= 279 ? stbiw__zlib_huff3(n) : stbiw__zlib_huff4(n)) +#define stbiw__zlib_huffb(n) ((n) <= 143 ? stbiw__zlib_huff1(n) : stbiw__zlib_huff2(n)) + +#define stbiw__ZHASH 16384 + +#endif // STBIW_ZLIB_COMPRESS + +STBIWDEF unsigned char * stbi_zlib_compress(unsigned char *data, int data_len, int *out_len, int quality) +{ +#ifdef STBIW_ZLIB_COMPRESS + // user provided a zlib compress implementation, use that + return STBIW_ZLIB_COMPRESS(data, data_len, out_len, quality); +#else // use builtin + static unsigned short lengthc[] = { 3,4,5,6,7,8,9,10,11,13,15,17,19,23,27,31,35,43,51,59,67,83,99,115,131,163,195,227,258, 259 }; + static unsigned char lengtheb[]= { 0,0,0,0,0,0,0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 0 }; + static unsigned short distc[] = { 1,2,3,4,5,7,9,13,17,25,33,49,65,97,129,193,257,385,513,769,1025,1537,2049,3073,4097,6145,8193,12289,16385,24577, 32768 }; + static unsigned char disteb[] = { 0,0,0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,13,13 }; + unsigned int bitbuf=0; + int i,j, bitcount=0; + unsigned char *out = NULL; + unsigned char ***hash_table = (unsigned char***) STBIW_MALLOC(stbiw__ZHASH * sizeof(char**)); + if (hash_table == NULL) + return NULL; + if (quality < 5) quality = 5; + + stbiw__sbpush(out, 0x78); // DEFLATE 32K window + stbiw__sbpush(out, 0x5e); // FLEVEL = 1 + stbiw__zlib_add(1,1); // BFINAL = 1 + stbiw__zlib_add(1,2); // BTYPE = 1 -- fixed huffman + + for (i=0; i < stbiw__ZHASH; ++i) + hash_table[i] = NULL; + + i=0; + while (i < data_len-3) { + // hash next 3 bytes of data to be compressed + int h = stbiw__zhash(data+i)&(stbiw__ZHASH-1), best=3; + unsigned char *bestloc = 0; + unsigned char **hlist = hash_table[h]; + int n = stbiw__sbcount(hlist); + for (j=0; j < n; ++j) { + if (hlist[j]-data > i-32768) { // if entry lies within window + int d = stbiw__zlib_countm(hlist[j], data+i, data_len-i); + if (d >= best) best=d,bestloc=hlist[j]; + } + } + // when hash table entry is too long, delete half the entries + if (hash_table[h] && stbiw__sbn(hash_table[h]) == 2*quality) { + STBIW_MEMMOVE(hash_table[h], hash_table[h]+quality, sizeof(hash_table[h][0])*quality); + stbiw__sbn(hash_table[h]) = quality; + } + stbiw__sbpush(hash_table[h],data+i); + + if (bestloc) { + // "lazy matching" - check match at *next* byte, and if it's better, do cur byte as literal + h = stbiw__zhash(data+i+1)&(stbiw__ZHASH-1); + hlist = hash_table[h]; + n = stbiw__sbcount(hlist); + for (j=0; j < n; ++j) { + if (hlist[j]-data > i-32767) { + int e = stbiw__zlib_countm(hlist[j], data+i+1, data_len-i-1); + if (e > best) { // if next match is better, bail on current match + bestloc = NULL; + break; + } + } + } + } + + if (bestloc) { + int d = (int) (data+i - bestloc); // distance back + STBIW_ASSERT(d <= 32767 && best <= 258); + for (j=0; best > lengthc[j+1]-1; ++j); + stbiw__zlib_huff(j+257); + if (lengtheb[j]) stbiw__zlib_add(best - lengthc[j], lengtheb[j]); + for (j=0; d > distc[j+1]-1; ++j); + stbiw__zlib_add(stbiw__zlib_bitrev(j,5),5); + if (disteb[j]) stbiw__zlib_add(d - distc[j], disteb[j]); + i += best; + } else { + stbiw__zlib_huffb(data[i]); + ++i; + } + } + // write out final bytes + for (;i < data_len; ++i) + stbiw__zlib_huffb(data[i]); + stbiw__zlib_huff(256); // end of block + // pad with 0 bits to byte boundary + while (bitcount) + stbiw__zlib_add(0,1); + + for (i=0; i < stbiw__ZHASH; ++i) + (void) stbiw__sbfree(hash_table[i]); + STBIW_FREE(hash_table); + + { + // compute adler32 on input + unsigned int s1=1, s2=0; + int blocklen = (int) (data_len % 5552); + j=0; + while (j < data_len) { + for (i=0; i < blocklen; ++i) s1 += data[j+i], s2 += s1; + s1 %= 65521, s2 %= 65521; + j += blocklen; + blocklen = 5552; + } + stbiw__sbpush(out, STBIW_UCHAR(s2 >> 8)); + stbiw__sbpush(out, STBIW_UCHAR(s2)); + stbiw__sbpush(out, STBIW_UCHAR(s1 >> 8)); + stbiw__sbpush(out, STBIW_UCHAR(s1)); + } + *out_len = stbiw__sbn(out); + // make returned pointer freeable + STBIW_MEMMOVE(stbiw__sbraw(out), out, *out_len); + return (unsigned char *) stbiw__sbraw(out); +#endif // STBIW_ZLIB_COMPRESS +} + +static unsigned int stbiw__crc32(unsigned char *buffer, int len) +{ +#ifdef STBIW_CRC32 + return STBIW_CRC32(buffer, len); +#else + static unsigned int crc_table[256] = + { + 0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419, 0x706AF48F, 0xE963A535, 0x9E6495A3, + 0x0eDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988, 0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91, + 0x1DB71064, 0x6AB020F2, 0xF3B97148, 0x84BE41DE, 0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7, + 0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC, 0x14015C4F, 0x63066CD9, 0xFA0F3D63, 0x8D080DF5, + 0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172, 0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B, + 0x35B5A8FA, 0x42B2986C, 0xDBBBC9D6, 0xACBCF940, 0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59, + 0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116, 0x21B4F4B5, 0x56B3C423, 0xCFBA9599, 0xB8BDA50F, + 0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924, 0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D, + 0x76DC4190, 0x01DB7106, 0x98D220BC, 0xEFD5102A, 0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433, + 0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818, 0x7F6A0DBB, 0x086D3D2D, 0x91646C97, 0xE6635C01, + 0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E, 0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457, + 0x65B0D9C6, 0x12B7E950, 0x8BBEB8EA, 0xFCB9887C, 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65, + 0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2, 0x4ADFA541, 0x3DD895D7, 0xA4D1C46D, 0xD3D6F4FB, + 0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0, 0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9, + 0x5005713C, 0x270241AA, 0xBE0B1010, 0xC90C2086, 0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F, + 0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4, 0x59B33D17, 0x2EB40D81, 0xB7BD5C3B, 0xC0BA6CAD, + 0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A, 0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683, + 0xE3630B12, 0x94643B84, 0x0D6D6A3E, 0x7A6A5AA8, 0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1, + 0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE, 0xF762575D, 0x806567CB, 0x196C3671, 0x6E6B06E7, + 0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC, 0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5, + 0xD6D6A3E8, 0xA1D1937E, 0x38D8C2C4, 0x4FDFF252, 0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B, + 0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60, 0xDF60EFC3, 0xA867DF55, 0x316E8EEF, 0x4669BE79, + 0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236, 0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F, + 0xC5BA3BBE, 0xB2BD0B28, 0x2BB45A92, 0x5CB36A04, 0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D, + 0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A, 0x9C0906A9, 0xEB0E363F, 0x72076785, 0x05005713, + 0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38, 0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21, + 0x86D3D2D4, 0xF1D4E242, 0x68DDB3F8, 0x1FDA836E, 0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777, + 0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C, 0x8F659EFF, 0xF862AE69, 0x616BFFD3, 0x166CCF45, + 0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2, 0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB, + 0xAED16A4A, 0xD9D65ADC, 0x40DF0B66, 0x37D83BF0, 0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9, + 0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6, 0xBAD03605, 0xCDD70693, 0x54DE5729, 0x23D967BF, + 0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94, 0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D + }; + + unsigned int crc = ~0u; + int i; + for (i=0; i < len; ++i) + crc = (crc >> 8) ^ crc_table[buffer[i] ^ (crc & 0xff)]; + return ~crc; +#endif +} + +#define stbiw__wpng4(o,a,b,c,d) ((o)[0]=STBIW_UCHAR(a),(o)[1]=STBIW_UCHAR(b),(o)[2]=STBIW_UCHAR(c),(o)[3]=STBIW_UCHAR(d),(o)+=4) +#define stbiw__wp32(data,v) stbiw__wpng4(data, (v)>>24,(v)>>16,(v)>>8,(v)); +#define stbiw__wptag(data,s) stbiw__wpng4(data, s[0],s[1],s[2],s[3]) + +static void stbiw__wpcrc(unsigned char **data, int len) +{ + unsigned int crc = stbiw__crc32(*data - len - 4, len+4); + stbiw__wp32(*data, crc); +} + +static unsigned char stbiw__paeth(int a, int b, int c) +{ + int p = a + b - c, pa = abs(p-a), pb = abs(p-b), pc = abs(p-c); + if (pa <= pb && pa <= pc) return STBIW_UCHAR(a); + if (pb <= pc) return STBIW_UCHAR(b); + return STBIW_UCHAR(c); +} + +// @OPTIMIZE: provide an option that always forces left-predict or paeth predict +static void stbiw__encode_png_line(unsigned char *pixels, int stride_bytes, int width, int height, int y, int n, int filter_type, signed char *line_buffer) +{ + static int mapping[] = { 0,1,2,3,4 }; + static int firstmap[] = { 0,1,0,5,6 }; + int *mymap = (y != 0) ? mapping : firstmap; + int i; + int type = mymap[filter_type]; + unsigned char *z = pixels + stride_bytes * (stbi__flip_vertically_on_write ? height-1-y : y); + int signed_stride = stbi__flip_vertically_on_write ? -stride_bytes : stride_bytes; + + if (type==0) { + memcpy(line_buffer, z, width*n); + return; + } + + // first loop isn't optimized since it's just one pixel + for (i = 0; i < n; ++i) { + switch (type) { + case 1: line_buffer[i] = z[i]; break; + case 2: line_buffer[i] = z[i] - z[i-signed_stride]; break; + case 3: line_buffer[i] = z[i] - (z[i-signed_stride]>>1); break; + case 4: line_buffer[i] = (signed char) (z[i] - stbiw__paeth(0,z[i-signed_stride],0)); break; + case 5: line_buffer[i] = z[i]; break; + case 6: line_buffer[i] = z[i]; break; + } + } + switch (type) { + case 1: for (i=n; i < width*n; ++i) line_buffer[i] = z[i] - z[i-n]; break; + case 2: for (i=n; i < width*n; ++i) line_buffer[i] = z[i] - z[i-signed_stride]; break; + case 3: for (i=n; i < width*n; ++i) line_buffer[i] = z[i] - ((z[i-n] + z[i-signed_stride])>>1); break; + case 4: for (i=n; i < width*n; ++i) line_buffer[i] = z[i] - stbiw__paeth(z[i-n], z[i-signed_stride], z[i-signed_stride-n]); break; + case 5: for (i=n; i < width*n; ++i) line_buffer[i] = z[i] - (z[i-n]>>1); break; + case 6: for (i=n; i < width*n; ++i) line_buffer[i] = z[i] - stbiw__paeth(z[i-n], 0,0); break; + } +} + +STBIWDEF unsigned char *stbi_write_png_to_mem(const unsigned char *pixels, int stride_bytes, int x, int y, int n, int *out_len) +{ + int force_filter = stbi_write_force_png_filter; + int ctype[5] = { -1, 0, 4, 2, 6 }; + unsigned char sig[8] = { 137,80,78,71,13,10,26,10 }; + unsigned char *out,*o, *filt, *zlib; + signed char *line_buffer; + int j,zlen; + + if (stride_bytes == 0) + stride_bytes = x * n; + + if (force_filter >= 5) { + force_filter = -1; + } + + filt = (unsigned char *) STBIW_MALLOC((x*n+1) * y); if (!filt) return 0; + line_buffer = (signed char *) STBIW_MALLOC(x * n); if (!line_buffer) { STBIW_FREE(filt); return 0; } + for (j=0; j < y; ++j) { + int filter_type; + if (force_filter > -1) { + filter_type = force_filter; + stbiw__encode_png_line((unsigned char*)(pixels), stride_bytes, x, y, j, n, force_filter, line_buffer); + } else { // Estimate the best filter by running through all of them: + int best_filter = 0, best_filter_val = 0x7fffffff, est, i; + for (filter_type = 0; filter_type < 5; filter_type++) { + stbiw__encode_png_line((unsigned char*)(pixels), stride_bytes, x, y, j, n, filter_type, line_buffer); + + // Estimate the entropy of the line using this filter; the less, the better. + est = 0; + for (i = 0; i < x*n; ++i) { + est += abs((signed char) line_buffer[i]); + } + if (est < best_filter_val) { + best_filter_val = est; + best_filter = filter_type; + } + } + if (filter_type != best_filter) { // If the last iteration already got us the best filter, don't redo it + stbiw__encode_png_line((unsigned char*)(pixels), stride_bytes, x, y, j, n, best_filter, line_buffer); + filter_type = best_filter; + } + } + // when we get here, filter_type contains the filter type, and line_buffer contains the data + filt[j*(x*n+1)] = (unsigned char) filter_type; + STBIW_MEMMOVE(filt+j*(x*n+1)+1, line_buffer, x*n); + } + STBIW_FREE(line_buffer); + zlib = stbi_zlib_compress(filt, y*( x*n+1), &zlen, stbi_write_png_compression_level); + STBIW_FREE(filt); + if (!zlib) return 0; + + // each tag requires 12 bytes of overhead + out = (unsigned char *) STBIW_MALLOC(8 + 12+13 + 12+zlen + 12); + if (!out) return 0; + *out_len = 8 + 12+13 + 12+zlen + 12; + + o=out; + STBIW_MEMMOVE(o,sig,8); o+= 8; + stbiw__wp32(o, 13); // header length + stbiw__wptag(o, "IHDR"); + stbiw__wp32(o, x); + stbiw__wp32(o, y); + *o++ = 8; + *o++ = STBIW_UCHAR(ctype[n]); + *o++ = 0; + *o++ = 0; + *o++ = 0; + stbiw__wpcrc(&o,13); + + stbiw__wp32(o, zlen); + stbiw__wptag(o, "IDAT"); + STBIW_MEMMOVE(o, zlib, zlen); + o += zlen; + STBIW_FREE(zlib); + stbiw__wpcrc(&o, zlen); + + stbiw__wp32(o,0); + stbiw__wptag(o, "IEND"); + stbiw__wpcrc(&o,0); + + STBIW_ASSERT(o == out + *out_len); + + return out; +} + +#ifndef STBI_WRITE_NO_STDIO +STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes) +{ + FILE *f; + int len; + unsigned char *png = stbi_write_png_to_mem((const unsigned char *) data, stride_bytes, x, y, comp, &len); + if (png == NULL) return 0; + + f = stbiw__fopen(filename, "wb"); + if (!f) { STBIW_FREE(png); return 0; } + fwrite(png, 1, len, f); + fclose(f); + STBIW_FREE(png); + return 1; +} +#endif + +STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes) +{ + int len; + unsigned char *png = stbi_write_png_to_mem((const unsigned char *) data, stride_bytes, x, y, comp, &len); + if (png == NULL) return 0; + func(context, png, len); + STBIW_FREE(png); + return 1; +} + + +/* *************************************************************************** + * + * JPEG writer + * + * This is based on Jon Olick's jo_jpeg.cpp: + * public domain Simple, Minimalistic JPEG writer - http://www.jonolick.com/code.html + */ + +static const unsigned char stbiw__jpg_ZigZag[] = { 0,1,5,6,14,15,27,28,2,4,7,13,16,26,29,42,3,8,12,17,25,30,41,43,9,11,18, + 24,31,40,44,53,10,19,23,32,39,45,52,54,20,22,33,38,46,51,55,60,21,34,37,47,50,56,59,61,35,36,48,49,57,58,62,63 }; + +static void stbiw__jpg_writeBits(stbi__write_context *s, int *bitBufP, int *bitCntP, const unsigned short *bs) { + int bitBuf = *bitBufP, bitCnt = *bitCntP; + bitCnt += bs[1]; + bitBuf |= bs[0] << (24 - bitCnt); + while(bitCnt >= 8) { + unsigned char c = (bitBuf >> 16) & 255; + stbiw__putc(s, c); + if(c == 255) { + stbiw__putc(s, 0); + } + bitBuf <<= 8; + bitCnt -= 8; + } + *bitBufP = bitBuf; + *bitCntP = bitCnt; +} + +static void stbiw__jpg_DCT(float *d0p, float *d1p, float *d2p, float *d3p, float *d4p, float *d5p, float *d6p, float *d7p) { + float d0 = *d0p, d1 = *d1p, d2 = *d2p, d3 = *d3p, d4 = *d4p, d5 = *d5p, d6 = *d6p, d7 = *d7p; + float z1, z2, z3, z4, z5, z11, z13; + + float tmp0 = d0 + d7; + float tmp7 = d0 - d7; + float tmp1 = d1 + d6; + float tmp6 = d1 - d6; + float tmp2 = d2 + d5; + float tmp5 = d2 - d5; + float tmp3 = d3 + d4; + float tmp4 = d3 - d4; + + // Even part + float tmp10 = tmp0 + tmp3; // phase 2 + float tmp13 = tmp0 - tmp3; + float tmp11 = tmp1 + tmp2; + float tmp12 = tmp1 - tmp2; + + d0 = tmp10 + tmp11; // phase 3 + d4 = tmp10 - tmp11; + + z1 = (tmp12 + tmp13) * 0.707106781f; // c4 + d2 = tmp13 + z1; // phase 5 + d6 = tmp13 - z1; + + // Odd part + tmp10 = tmp4 + tmp5; // phase 2 + tmp11 = tmp5 + tmp6; + tmp12 = tmp6 + tmp7; + + // The rotator is modified from fig 4-8 to avoid extra negations. + z5 = (tmp10 - tmp12) * 0.382683433f; // c6 + z2 = tmp10 * 0.541196100f + z5; // c2-c6 + z4 = tmp12 * 1.306562965f + z5; // c2+c6 + z3 = tmp11 * 0.707106781f; // c4 + + z11 = tmp7 + z3; // phase 5 + z13 = tmp7 - z3; + + *d5p = z13 + z2; // phase 6 + *d3p = z13 - z2; + *d1p = z11 + z4; + *d7p = z11 - z4; + + *d0p = d0; *d2p = d2; *d4p = d4; *d6p = d6; +} + +static void stbiw__jpg_calcBits(int val, unsigned short bits[2]) { + int tmp1 = val < 0 ? -val : val; + val = val < 0 ? val-1 : val; + bits[1] = 1; + while(tmp1 >>= 1) { + ++bits[1]; + } + bits[0] = val & ((1<0)&&(DU[end0pos]==0); --end0pos) { + } + // end0pos = first element in reverse order !=0 + if(end0pos == 0) { + stbiw__jpg_writeBits(s, bitBuf, bitCnt, EOB); + return DU[0]; + } + for(i = 1; i <= end0pos; ++i) { + int startpos = i; + int nrzeroes; + unsigned short bits[2]; + for (; DU[i]==0 && i<=end0pos; ++i) { + } + nrzeroes = i-startpos; + if ( nrzeroes >= 16 ) { + int lng = nrzeroes>>4; + int nrmarker; + for (nrmarker=1; nrmarker <= lng; ++nrmarker) + stbiw__jpg_writeBits(s, bitBuf, bitCnt, M16zeroes); + nrzeroes &= 15; + } + stbiw__jpg_calcBits(DU[i], bits); + stbiw__jpg_writeBits(s, bitBuf, bitCnt, HTAC[(nrzeroes<<4)+bits[1]]); + stbiw__jpg_writeBits(s, bitBuf, bitCnt, bits); + } + if(end0pos != 63) { + stbiw__jpg_writeBits(s, bitBuf, bitCnt, EOB); + } + return DU[0]; +} + +static int stbi_write_jpg_core(stbi__write_context *s, int width, int height, int comp, const void* data, int quality) { + // Constants that don't pollute global namespace + static const unsigned char std_dc_luminance_nrcodes[] = {0,0,1,5,1,1,1,1,1,1,0,0,0,0,0,0,0}; + static const unsigned char std_dc_luminance_values[] = {0,1,2,3,4,5,6,7,8,9,10,11}; + static const unsigned char std_ac_luminance_nrcodes[] = {0,0,2,1,3,3,2,4,3,5,5,4,4,0,0,1,0x7d}; + static const unsigned char std_ac_luminance_values[] = { + 0x01,0x02,0x03,0x00,0x04,0x11,0x05,0x12,0x21,0x31,0x41,0x06,0x13,0x51,0x61,0x07,0x22,0x71,0x14,0x32,0x81,0x91,0xa1,0x08, + 0x23,0x42,0xb1,0xc1,0x15,0x52,0xd1,0xf0,0x24,0x33,0x62,0x72,0x82,0x09,0x0a,0x16,0x17,0x18,0x19,0x1a,0x25,0x26,0x27,0x28, + 0x29,0x2a,0x34,0x35,0x36,0x37,0x38,0x39,0x3a,0x43,0x44,0x45,0x46,0x47,0x48,0x49,0x4a,0x53,0x54,0x55,0x56,0x57,0x58,0x59, + 0x5a,0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6a,0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7a,0x83,0x84,0x85,0x86,0x87,0x88,0x89, + 0x8a,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9a,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7,0xa8,0xa9,0xaa,0xb2,0xb3,0xb4,0xb5,0xb6, + 0xb7,0xb8,0xb9,0xba,0xc2,0xc3,0xc4,0xc5,0xc6,0xc7,0xc8,0xc9,0xca,0xd2,0xd3,0xd4,0xd5,0xd6,0xd7,0xd8,0xd9,0xda,0xe1,0xe2, + 0xe3,0xe4,0xe5,0xe6,0xe7,0xe8,0xe9,0xea,0xf1,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7,0xf8,0xf9,0xfa + }; + static const unsigned char std_dc_chrominance_nrcodes[] = {0,0,3,1,1,1,1,1,1,1,1,1,0,0,0,0,0}; + static const unsigned char std_dc_chrominance_values[] = {0,1,2,3,4,5,6,7,8,9,10,11}; + static const unsigned char std_ac_chrominance_nrcodes[] = {0,0,2,1,2,4,4,3,4,7,5,4,4,0,1,2,0x77}; + static const unsigned char std_ac_chrominance_values[] = { + 0x00,0x01,0x02,0x03,0x11,0x04,0x05,0x21,0x31,0x06,0x12,0x41,0x51,0x07,0x61,0x71,0x13,0x22,0x32,0x81,0x08,0x14,0x42,0x91, + 0xa1,0xb1,0xc1,0x09,0x23,0x33,0x52,0xf0,0x15,0x62,0x72,0xd1,0x0a,0x16,0x24,0x34,0xe1,0x25,0xf1,0x17,0x18,0x19,0x1a,0x26, + 0x27,0x28,0x29,0x2a,0x35,0x36,0x37,0x38,0x39,0x3a,0x43,0x44,0x45,0x46,0x47,0x48,0x49,0x4a,0x53,0x54,0x55,0x56,0x57,0x58, + 0x59,0x5a,0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6a,0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7a,0x82,0x83,0x84,0x85,0x86,0x87, + 0x88,0x89,0x8a,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9a,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7,0xa8,0xa9,0xaa,0xb2,0xb3,0xb4, + 0xb5,0xb6,0xb7,0xb8,0xb9,0xba,0xc2,0xc3,0xc4,0xc5,0xc6,0xc7,0xc8,0xc9,0xca,0xd2,0xd3,0xd4,0xd5,0xd6,0xd7,0xd8,0xd9,0xda, + 0xe2,0xe3,0xe4,0xe5,0xe6,0xe7,0xe8,0xe9,0xea,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7,0xf8,0xf9,0xfa + }; + // Huffman tables + static const unsigned short YDC_HT[256][2] = { {0,2},{2,3},{3,3},{4,3},{5,3},{6,3},{14,4},{30,5},{62,6},{126,7},{254,8},{510,9}}; + static const unsigned short UVDC_HT[256][2] = { {0,2},{1,2},{2,2},{6,3},{14,4},{30,5},{62,6},{126,7},{254,8},{510,9},{1022,10},{2046,11}}; + static const unsigned short YAC_HT[256][2] = { + {10,4},{0,2},{1,2},{4,3},{11,4},{26,5},{120,7},{248,8},{1014,10},{65410,16},{65411,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {12,4},{27,5},{121,7},{502,9},{2038,11},{65412,16},{65413,16},{65414,16},{65415,16},{65416,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {28,5},{249,8},{1015,10},{4084,12},{65417,16},{65418,16},{65419,16},{65420,16},{65421,16},{65422,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {58,6},{503,9},{4085,12},{65423,16},{65424,16},{65425,16},{65426,16},{65427,16},{65428,16},{65429,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {59,6},{1016,10},{65430,16},{65431,16},{65432,16},{65433,16},{65434,16},{65435,16},{65436,16},{65437,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {122,7},{2039,11},{65438,16},{65439,16},{65440,16},{65441,16},{65442,16},{65443,16},{65444,16},{65445,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {123,7},{4086,12},{65446,16},{65447,16},{65448,16},{65449,16},{65450,16},{65451,16},{65452,16},{65453,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {250,8},{4087,12},{65454,16},{65455,16},{65456,16},{65457,16},{65458,16},{65459,16},{65460,16},{65461,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {504,9},{32704,15},{65462,16},{65463,16},{65464,16},{65465,16},{65466,16},{65467,16},{65468,16},{65469,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {505,9},{65470,16},{65471,16},{65472,16},{65473,16},{65474,16},{65475,16},{65476,16},{65477,16},{65478,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {506,9},{65479,16},{65480,16},{65481,16},{65482,16},{65483,16},{65484,16},{65485,16},{65486,16},{65487,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {1017,10},{65488,16},{65489,16},{65490,16},{65491,16},{65492,16},{65493,16},{65494,16},{65495,16},{65496,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {1018,10},{65497,16},{65498,16},{65499,16},{65500,16},{65501,16},{65502,16},{65503,16},{65504,16},{65505,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {2040,11},{65506,16},{65507,16},{65508,16},{65509,16},{65510,16},{65511,16},{65512,16},{65513,16},{65514,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {65515,16},{65516,16},{65517,16},{65518,16},{65519,16},{65520,16},{65521,16},{65522,16},{65523,16},{65524,16},{0,0},{0,0},{0,0},{0,0},{0,0}, + {2041,11},{65525,16},{65526,16},{65527,16},{65528,16},{65529,16},{65530,16},{65531,16},{65532,16},{65533,16},{65534,16},{0,0},{0,0},{0,0},{0,0},{0,0} + }; + static const unsigned short UVAC_HT[256][2] = { + {0,2},{1,2},{4,3},{10,4},{24,5},{25,5},{56,6},{120,7},{500,9},{1014,10},{4084,12},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {11,4},{57,6},{246,8},{501,9},{2038,11},{4085,12},{65416,16},{65417,16},{65418,16},{65419,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {26,5},{247,8},{1015,10},{4086,12},{32706,15},{65420,16},{65421,16},{65422,16},{65423,16},{65424,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {27,5},{248,8},{1016,10},{4087,12},{65425,16},{65426,16},{65427,16},{65428,16},{65429,16},{65430,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {58,6},{502,9},{65431,16},{65432,16},{65433,16},{65434,16},{65435,16},{65436,16},{65437,16},{65438,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {59,6},{1017,10},{65439,16},{65440,16},{65441,16},{65442,16},{65443,16},{65444,16},{65445,16},{65446,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {121,7},{2039,11},{65447,16},{65448,16},{65449,16},{65450,16},{65451,16},{65452,16},{65453,16},{65454,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {122,7},{2040,11},{65455,16},{65456,16},{65457,16},{65458,16},{65459,16},{65460,16},{65461,16},{65462,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {249,8},{65463,16},{65464,16},{65465,16},{65466,16},{65467,16},{65468,16},{65469,16},{65470,16},{65471,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {503,9},{65472,16},{65473,16},{65474,16},{65475,16},{65476,16},{65477,16},{65478,16},{65479,16},{65480,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {504,9},{65481,16},{65482,16},{65483,16},{65484,16},{65485,16},{65486,16},{65487,16},{65488,16},{65489,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {505,9},{65490,16},{65491,16},{65492,16},{65493,16},{65494,16},{65495,16},{65496,16},{65497,16},{65498,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {506,9},{65499,16},{65500,16},{65501,16},{65502,16},{65503,16},{65504,16},{65505,16},{65506,16},{65507,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {2041,11},{65508,16},{65509,16},{65510,16},{65511,16},{65512,16},{65513,16},{65514,16},{65515,16},{65516,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {16352,14},{65517,16},{65518,16},{65519,16},{65520,16},{65521,16},{65522,16},{65523,16},{65524,16},{65525,16},{0,0},{0,0},{0,0},{0,0},{0,0}, + {1018,10},{32707,15},{65526,16},{65527,16},{65528,16},{65529,16},{65530,16},{65531,16},{65532,16},{65533,16},{65534,16},{0,0},{0,0},{0,0},{0,0},{0,0} + }; + static const int YQT[] = {16,11,10,16,24,40,51,61,12,12,14,19,26,58,60,55,14,13,16,24,40,57,69,56,14,17,22,29,51,87,80,62,18,22, + 37,56,68,109,103,77,24,35,55,64,81,104,113,92,49,64,78,87,103,121,120,101,72,92,95,98,112,100,103,99}; + static const int UVQT[] = {17,18,24,47,99,99,99,99,18,21,26,66,99,99,99,99,24,26,56,99,99,99,99,99,47,66,99,99,99,99,99,99, + 99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99}; + static const float aasf[] = { 1.0f * 2.828427125f, 1.387039845f * 2.828427125f, 1.306562965f * 2.828427125f, 1.175875602f * 2.828427125f, + 1.0f * 2.828427125f, 0.785694958f * 2.828427125f, 0.541196100f * 2.828427125f, 0.275899379f * 2.828427125f }; + + int row, col, i, k; + float fdtbl_Y[64], fdtbl_UV[64]; + unsigned char YTable[64], UVTable[64]; + + if(!data || !width || !height || comp > 4 || comp < 1) { + return 0; + } + + quality = quality ? quality : 90; + quality = quality < 1 ? 1 : quality > 100 ? 100 : quality; + quality = quality < 50 ? 5000 / quality : 200 - quality * 2; + + for(i = 0; i < 64; ++i) { + int uvti, yti = (YQT[i]*quality+50)/100; + YTable[stbiw__jpg_ZigZag[i]] = (unsigned char) (yti < 1 ? 1 : yti > 255 ? 255 : yti); + uvti = (UVQT[i]*quality+50)/100; + UVTable[stbiw__jpg_ZigZag[i]] = (unsigned char) (uvti < 1 ? 1 : uvti > 255 ? 255 : uvti); + } + + for(row = 0, k = 0; row < 8; ++row) { + for(col = 0; col < 8; ++col, ++k) { + fdtbl_Y[k] = 1 / (YTable [stbiw__jpg_ZigZag[k]] * aasf[row] * aasf[col]); + fdtbl_UV[k] = 1 / (UVTable[stbiw__jpg_ZigZag[k]] * aasf[row] * aasf[col]); + } + } + + // Write Headers + { + static const unsigned char head0[] = { 0xFF,0xD8,0xFF,0xE0,0,0x10,'J','F','I','F',0,1,1,0,0,1,0,1,0,0,0xFF,0xDB,0,0x84,0 }; + static const unsigned char head2[] = { 0xFF,0xDA,0,0xC,3,1,0,2,0x11,3,0x11,0,0x3F,0 }; + const unsigned char head1[] = { 0xFF,0xC0,0,0x11,8,(unsigned char)(height>>8),STBIW_UCHAR(height),(unsigned char)(width>>8),STBIW_UCHAR(width), + 3,1,0x11,0,2,0x11,1,3,0x11,1,0xFF,0xC4,0x01,0xA2,0 }; + s->func(s->context, (void*)head0, sizeof(head0)); + s->func(s->context, (void*)YTable, sizeof(YTable)); + stbiw__putc(s, 1); + s->func(s->context, UVTable, sizeof(UVTable)); + s->func(s->context, (void*)head1, sizeof(head1)); + s->func(s->context, (void*)(std_dc_luminance_nrcodes+1), sizeof(std_dc_luminance_nrcodes)-1); + s->func(s->context, (void*)std_dc_luminance_values, sizeof(std_dc_luminance_values)); + stbiw__putc(s, 0x10); // HTYACinfo + s->func(s->context, (void*)(std_ac_luminance_nrcodes+1), sizeof(std_ac_luminance_nrcodes)-1); + s->func(s->context, (void*)std_ac_luminance_values, sizeof(std_ac_luminance_values)); + stbiw__putc(s, 1); // HTUDCinfo + s->func(s->context, (void*)(std_dc_chrominance_nrcodes+1), sizeof(std_dc_chrominance_nrcodes)-1); + s->func(s->context, (void*)std_dc_chrominance_values, sizeof(std_dc_chrominance_values)); + stbiw__putc(s, 0x11); // HTUACinfo + s->func(s->context, (void*)(std_ac_chrominance_nrcodes+1), sizeof(std_ac_chrominance_nrcodes)-1); + s->func(s->context, (void*)std_ac_chrominance_values, sizeof(std_ac_chrominance_values)); + s->func(s->context, (void*)head2, sizeof(head2)); + } + + // Encode 8x8 macroblocks + { + static const unsigned short fillBits[] = {0x7F, 7}; + const unsigned char *imageData = (const unsigned char *)data; + int DCY=0, DCU=0, DCV=0; + int bitBuf=0, bitCnt=0; + // comp == 2 is grey+alpha (alpha is ignored) + int ofsG = comp > 2 ? 1 : 0, ofsB = comp > 2 ? 2 : 0; + int x, y, pos; + for(y = 0; y < height; y += 8) { + for(x = 0; x < width; x += 8) { + float YDU[64], UDU[64], VDU[64]; + for(row = y, pos = 0; row < y+8; ++row) { + // row >= height => use last input row + int clamped_row = (row < height) ? row : height - 1; + int base_p = (stbi__flip_vertically_on_write ? (height-1-clamped_row) : clamped_row)*width*comp; + for(col = x; col < x+8; ++col, ++pos) { + float r, g, b; + // if col >= width => use pixel from last input column + int p = base_p + ((col < width) ? col : (width-1))*comp; + + r = imageData[p+0]; + g = imageData[p+ofsG]; + b = imageData[p+ofsB]; + YDU[pos]=+0.29900f*r+0.58700f*g+0.11400f*b-128; + UDU[pos]=-0.16874f*r-0.33126f*g+0.50000f*b; + VDU[pos]=+0.50000f*r-0.41869f*g-0.08131f*b; + } + } + + DCY = stbiw__jpg_processDU(s, &bitBuf, &bitCnt, YDU, fdtbl_Y, DCY, YDC_HT, YAC_HT); + DCU = stbiw__jpg_processDU(s, &bitBuf, &bitCnt, UDU, fdtbl_UV, DCU, UVDC_HT, UVAC_HT); + DCV = stbiw__jpg_processDU(s, &bitBuf, &bitCnt, VDU, fdtbl_UV, DCV, UVDC_HT, UVAC_HT); + } + } + + // Do the bit alignment of the EOI marker + stbiw__jpg_writeBits(s, &bitBuf, &bitCnt, fillBits); + } + + // EOI + stbiw__putc(s, 0xFF); + stbiw__putc(s, 0xD9); + + return 1; +} + +STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality) +{ + stbi__write_context s; + stbi__start_write_callbacks(&s, func, context); + return stbi_write_jpg_core(&s, x, y, comp, (void *) data, quality); +} + + +#ifndef STBI_WRITE_NO_STDIO +STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality) +{ + stbi__write_context s; + if (stbi__start_write_file(&s,filename)) { + int r = stbi_write_jpg_core(&s, x, y, comp, data, quality); + stbi__end_write_file(&s); + return r; + } else + return 0; +} +#endif + +#endif // STB_IMAGE_WRITE_IMPLEMENTATION + +/* Revision history + 1.10 (2019-02-07) + support utf8 filenames in Windows; fix warnings and platform ifdefs + 1.09 (2018-02-11) + fix typo in zlib quality API, improve STB_I_W_STATIC in C++ + 1.08 (2018-01-29) + add stbi__flip_vertically_on_write, external zlib, zlib quality, choose PNG filter + 1.07 (2017-07-24) + doc fix + 1.06 (2017-07-23) + writing JPEG (using Jon Olick's code) + 1.05 ??? + 1.04 (2017-03-03) + monochrome BMP expansion + 1.03 ??? + 1.02 (2016-04-02) + avoid allocating large structures on the stack + 1.01 (2016-01-16) + STBIW_REALLOC_SIZED: support allocators with no realloc support + avoid race-condition in crc initialization + minor compile issues + 1.00 (2015-09-14) + installable file IO function + 0.99 (2015-09-13) + warning fixes; TGA rle support + 0.98 (2015-04-08) + added STBIW_MALLOC, STBIW_ASSERT etc + 0.97 (2015-01-18) + fixed HDR asserts, rewrote HDR rle logic + 0.96 (2015-01-17) + add HDR output + fix monochrome BMP + 0.95 (2014-08-17) + add monochrome TGA output + 0.94 (2014-05-31) + rename private functions to avoid conflicts with stb_image.h + 0.93 (2014-05-27) + warning fixes + 0.92 (2010-08-01) + casts to unsigned char to fix warnings + 0.91 (2010-07-17) + first public release + 0.90 first internal release +*/ + +/* +------------------------------------------------------------------------------ +This software is available under 2 licenses -- choose whichever you prefer. +------------------------------------------------------------------------------ +ALTERNATIVE A - MIT License +Copyright (c) 2017 Sean Barrett +Permission is hereby granted, free of charge, to any person obtaining a copy of +this software and associated documentation files (the "Software"), to deal in +the Software without restriction, including without limitation the rights to +use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies +of the Software, and to permit persons to whom the Software is furnished to do +so, subject to the following conditions: +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. +------------------------------------------------------------------------------ +ALTERNATIVE B - Public Domain (www.unlicense.org) +This is free and unencumbered software released into the public domain. +Anyone is free to copy, modify, publish, use, compile, sell, or distribute this +software, either in source code form or as a compiled binary, for any purpose, +commercial or non-commercial, and by any means. +In jurisdictions that recognize copyright laws, the author or authors of this +software dedicate any and all copyright interest in the software to the public +domain. We make this dedication for the benefit of the public at large and to +the detriment of our heirs and successors. We intend this dedication to be an +overt act of relinquishment in perpetuity of all present and future rights to +this software under copyright law. +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION +WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. +------------------------------------------------------------------------------ +*/ \ No newline at end of file diff --git a/third-party/tiny_gltf/tiny_gltf.cpp b/third-party/tiny_gltf/tiny_gltf.cpp new file mode 100644 index 0000000000..3f27915208 --- /dev/null +++ b/third-party/tiny_gltf/tiny_gltf.cpp @@ -0,0 +1,4 @@ +#define TINYGLTF_IMPLEMENTATION +#define STB_IMAGE_IMPLEMENTATION +#define STB_IMAGE_WRITE_IMPLEMENTATION +#include "tiny_gltf.h" diff --git a/third-party/tiny_gltf/tiny_gltf.h b/third-party/tiny_gltf/tiny_gltf.h new file mode 100644 index 0000000000..98cc4e42fc --- /dev/null +++ b/third-party/tiny_gltf/tiny_gltf.h @@ -0,0 +1,7748 @@ +// +// Header-only tiny glTF 2.0 loader and serializer. +// +// +// The MIT License (MIT) +// +// Copyright (c) 2015 - Present Syoyo Fujita, Aurélien Chatelain and many +// contributors. +// +// Permission is hereby granted, free of charge, to any person obtaining a copy +// of this software and associated documentation files (the "Software"), to deal +// in the Software without restriction, including without limitation the rights +// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +// copies of the Software, and to permit persons to whom the Software is +// furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +// THE SOFTWARE. + +// Version: +// - v2.5.0 Add SetPreserveImageChannels() option to load image data as is. +// - v2.4.3 Fix null object output when when material has all default +// parameters. +// - v2.4.2 Decode percent-encoded URI. +// - v2.4.1 Fix some glTF object class does not have `extensions` and/or +// `extras` property. +// - v2.4.0 Experimental RapidJSON and C++14 support(Thanks to @jrkoone). +// - v2.3.1 Set default value of minFilter and magFilter in Sampler to -1. +// - v2.3.0 Modified Material representation according to glTF 2.0 schema +// (and introduced TextureInfo class) +// Change the behavior of `Value::IsNumber`. It return true either the +// value is int or real. +// - v2.2.0 Add loading 16bit PNG support. Add Sparse accessor support(Thanks +// to @Ybalrid) +// - v2.1.0 Add draco compression. +// - v2.0.1 Add comparsion feature(Thanks to @Selmar). +// - v2.0.0 glTF 2.0!. +// +// Tiny glTF loader is using following third party libraries: +// +// - jsonhpp: C++ JSON library. +// - base64: base64 decode/encode library. +// - stb_image: Image loading library. +// +#ifndef TINY_GLTF_H_ +#define TINY_GLTF_H_ + +#include +#include +#include // std::fabs +#include +#include +#include +#include +#include +#include +#include + +#ifndef TINYGLTF_USE_CPP14 +#include +#endif + +#ifdef __ANDROID__ +#ifdef TINYGLTF_ANDROID_LOAD_FROM_ASSETS +#include +#endif +#endif + +#ifdef __GNUC__ +#if (__GNUC__ < 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ <= 8)) +#define TINYGLTF_NOEXCEPT +#else +#define TINYGLTF_NOEXCEPT noexcept +#endif +#else +#define TINYGLTF_NOEXCEPT noexcept +#endif + +#define DEFAULT_METHODS(x) \ + ~x() = default; \ + x(const x &) = default; \ + x(x &&) TINYGLTF_NOEXCEPT = default; \ + x &operator=(const x &) = default; \ + x &operator=(x &&) TINYGLTF_NOEXCEPT = default; + +namespace tinygltf { + +#define TINYGLTF_MODE_POINTS (0) +#define TINYGLTF_MODE_LINE (1) +#define TINYGLTF_MODE_LINE_LOOP (2) +#define TINYGLTF_MODE_LINE_STRIP (3) +#define TINYGLTF_MODE_TRIANGLES (4) +#define TINYGLTF_MODE_TRIANGLE_STRIP (5) +#define TINYGLTF_MODE_TRIANGLE_FAN (6) + +#define TINYGLTF_COMPONENT_TYPE_BYTE (5120) +#define TINYGLTF_COMPONENT_TYPE_UNSIGNED_BYTE (5121) +#define TINYGLTF_COMPONENT_TYPE_SHORT (5122) +#define TINYGLTF_COMPONENT_TYPE_UNSIGNED_SHORT (5123) +#define TINYGLTF_COMPONENT_TYPE_INT (5124) +#define TINYGLTF_COMPONENT_TYPE_UNSIGNED_INT (5125) +#define TINYGLTF_COMPONENT_TYPE_FLOAT (5126) +#define TINYGLTF_COMPONENT_TYPE_DOUBLE (5130) // OpenGL double type. Note that some of glTF 2.0 validator does not support double type even the schema seems allow any value of integer: https://github.com/KhronosGroup/glTF/blob/b9884a2fd45130b4d673dd6c8a706ee21ee5c5f7/specification/2.0/schema/accessor.schema.json#L22 + +#define TINYGLTF_TEXTURE_FILTER_NEAREST (9728) +#define TINYGLTF_TEXTURE_FILTER_LINEAR (9729) +#define TINYGLTF_TEXTURE_FILTER_NEAREST_MIPMAP_NEAREST (9984) +#define TINYGLTF_TEXTURE_FILTER_LINEAR_MIPMAP_NEAREST (9985) +#define TINYGLTF_TEXTURE_FILTER_NEAREST_MIPMAP_LINEAR (9986) +#define TINYGLTF_TEXTURE_FILTER_LINEAR_MIPMAP_LINEAR (9987) + +#define TINYGLTF_TEXTURE_WRAP_REPEAT (10497) +#define TINYGLTF_TEXTURE_WRAP_CLAMP_TO_EDGE (33071) +#define TINYGLTF_TEXTURE_WRAP_MIRRORED_REPEAT (33648) + +// Redeclarations of the above for technique.parameters. +#define TINYGLTF_PARAMETER_TYPE_BYTE (5120) +#define TINYGLTF_PARAMETER_TYPE_UNSIGNED_BYTE (5121) +#define TINYGLTF_PARAMETER_TYPE_SHORT (5122) +#define TINYGLTF_PARAMETER_TYPE_UNSIGNED_SHORT (5123) +#define TINYGLTF_PARAMETER_TYPE_INT (5124) +#define TINYGLTF_PARAMETER_TYPE_UNSIGNED_INT (5125) +#define TINYGLTF_PARAMETER_TYPE_FLOAT (5126) + +#define TINYGLTF_PARAMETER_TYPE_FLOAT_VEC2 (35664) +#define TINYGLTF_PARAMETER_TYPE_FLOAT_VEC3 (35665) +#define TINYGLTF_PARAMETER_TYPE_FLOAT_VEC4 (35666) + +#define TINYGLTF_PARAMETER_TYPE_INT_VEC2 (35667) +#define TINYGLTF_PARAMETER_TYPE_INT_VEC3 (35668) +#define TINYGLTF_PARAMETER_TYPE_INT_VEC4 (35669) + +#define TINYGLTF_PARAMETER_TYPE_BOOL (35670) +#define TINYGLTF_PARAMETER_TYPE_BOOL_VEC2 (35671) +#define TINYGLTF_PARAMETER_TYPE_BOOL_VEC3 (35672) +#define TINYGLTF_PARAMETER_TYPE_BOOL_VEC4 (35673) + +#define TINYGLTF_PARAMETER_TYPE_FLOAT_MAT2 (35674) +#define TINYGLTF_PARAMETER_TYPE_FLOAT_MAT3 (35675) +#define TINYGLTF_PARAMETER_TYPE_FLOAT_MAT4 (35676) + +#define TINYGLTF_PARAMETER_TYPE_SAMPLER_2D (35678) + +// End parameter types + +#define TINYGLTF_TYPE_VEC2 (2) +#define TINYGLTF_TYPE_VEC3 (3) +#define TINYGLTF_TYPE_VEC4 (4) +#define TINYGLTF_TYPE_MAT2 (32 + 2) +#define TINYGLTF_TYPE_MAT3 (32 + 3) +#define TINYGLTF_TYPE_MAT4 (32 + 4) +#define TINYGLTF_TYPE_SCALAR (64 + 1) +#define TINYGLTF_TYPE_VECTOR (64 + 4) +#define TINYGLTF_TYPE_MATRIX (64 + 16) + +#define TINYGLTF_IMAGE_FORMAT_JPEG (0) +#define TINYGLTF_IMAGE_FORMAT_PNG (1) +#define TINYGLTF_IMAGE_FORMAT_BMP (2) +#define TINYGLTF_IMAGE_FORMAT_GIF (3) + +#define TINYGLTF_TEXTURE_FORMAT_ALPHA (6406) +#define TINYGLTF_TEXTURE_FORMAT_RGB (6407) +#define TINYGLTF_TEXTURE_FORMAT_RGBA (6408) +#define TINYGLTF_TEXTURE_FORMAT_LUMINANCE (6409) +#define TINYGLTF_TEXTURE_FORMAT_LUMINANCE_ALPHA (6410) + +#define TINYGLTF_TEXTURE_TARGET_TEXTURE2D (3553) +#define TINYGLTF_TEXTURE_TYPE_UNSIGNED_BYTE (5121) + +#define TINYGLTF_TARGET_ARRAY_BUFFER (34962) +#define TINYGLTF_TARGET_ELEMENT_ARRAY_BUFFER (34963) + +#define TINYGLTF_SHADER_TYPE_VERTEX_SHADER (35633) +#define TINYGLTF_SHADER_TYPE_FRAGMENT_SHADER (35632) + +#define TINYGLTF_DOUBLE_EPS (1.e-12) +#define TINYGLTF_DOUBLE_EQUAL(a, b) (std::fabs((b) - (a)) < TINYGLTF_DOUBLE_EPS) + +#ifdef __ANDROID__ +#ifdef TINYGLTF_ANDROID_LOAD_FROM_ASSETS +AAssetManager *asset_manager = nullptr; +#endif +#endif + +typedef enum { + NULL_TYPE, + REAL_TYPE, + INT_TYPE, + BOOL_TYPE, + STRING_TYPE, + ARRAY_TYPE, + BINARY_TYPE, + OBJECT_TYPE +} Type; + +static inline int32_t GetComponentSizeInBytes(uint32_t componentType) { + if (componentType == TINYGLTF_COMPONENT_TYPE_BYTE) { + return 1; + } else if (componentType == TINYGLTF_COMPONENT_TYPE_UNSIGNED_BYTE) { + return 1; + } else if (componentType == TINYGLTF_COMPONENT_TYPE_SHORT) { + return 2; + } else if (componentType == TINYGLTF_COMPONENT_TYPE_UNSIGNED_SHORT) { + return 2; + } else if (componentType == TINYGLTF_COMPONENT_TYPE_INT) { + return 4; + } else if (componentType == TINYGLTF_COMPONENT_TYPE_UNSIGNED_INT) { + return 4; + } else if (componentType == TINYGLTF_COMPONENT_TYPE_FLOAT) { + return 4; + } else if (componentType == TINYGLTF_COMPONENT_TYPE_DOUBLE) { + return 8; + } else { + // Unknown componenty type + return -1; + } +} + +static inline int32_t GetNumComponentsInType(uint32_t ty) { + if (ty == TINYGLTF_TYPE_SCALAR) { + return 1; + } else if (ty == TINYGLTF_TYPE_VEC2) { + return 2; + } else if (ty == TINYGLTF_TYPE_VEC3) { + return 3; + } else if (ty == TINYGLTF_TYPE_VEC4) { + return 4; + } else if (ty == TINYGLTF_TYPE_MAT2) { + return 4; + } else if (ty == TINYGLTF_TYPE_MAT3) { + return 9; + } else if (ty == TINYGLTF_TYPE_MAT4) { + return 16; + } else { + // Unknown componenty type + return -1; + } +} + +// TODO(syoyo): Move these functions to TinyGLTF class +bool IsDataURI(const std::string &in); +bool DecodeDataURI(std::vector *out, std::string &mime_type, + const std::string &in, size_t reqBytes, bool checkSize); + +#ifdef __clang__ +#pragma clang diagnostic push +// Suppress warning for : static Value null_value +#pragma clang diagnostic ignored "-Wexit-time-destructors" +#pragma clang diagnostic ignored "-Wpadded" +#endif + +// Simple class to represent JSON object +class Value { + public: + typedef std::vector Array; + typedef std::map Object; + + Value() + : type_(NULL_TYPE), + int_value_(0), + real_value_(0.0), + boolean_value_(false) {} + + explicit Value(bool b) : type_(BOOL_TYPE) { boolean_value_ = b; } + explicit Value(int i) : type_(INT_TYPE) { + int_value_ = i; + real_value_ = i; + } + explicit Value(double n) : type_(REAL_TYPE) { real_value_ = n; } + explicit Value(const std::string &s) : type_(STRING_TYPE) { + string_value_ = s; + } + explicit Value(std::string &&s) + : type_(STRING_TYPE), string_value_(std::move(s)) {} + explicit Value(const unsigned char *p, size_t n) : type_(BINARY_TYPE) { + binary_value_.resize(n); + memcpy(binary_value_.data(), p, n); + } + explicit Value(std::vector &&v) noexcept + : type_(BINARY_TYPE), + binary_value_(std::move(v)) {} + explicit Value(const Array &a) : type_(ARRAY_TYPE) { array_value_ = a; } + explicit Value(Array &&a) noexcept : type_(ARRAY_TYPE), + array_value_(std::move(a)) {} + + explicit Value(const Object &o) : type_(OBJECT_TYPE) { object_value_ = o; } + explicit Value(Object &&o) noexcept : type_(OBJECT_TYPE), + object_value_(std::move(o)) {} + + DEFAULT_METHODS(Value) + + char Type() const { return static_cast(type_); } + + bool IsBool() const { return (type_ == BOOL_TYPE); } + + bool IsInt() const { return (type_ == INT_TYPE); } + + bool IsNumber() const { return (type_ == REAL_TYPE) || (type_ == INT_TYPE); } + + bool IsReal() const { return (type_ == REAL_TYPE); } + + bool IsString() const { return (type_ == STRING_TYPE); } + + bool IsBinary() const { return (type_ == BINARY_TYPE); } + + bool IsArray() const { return (type_ == ARRAY_TYPE); } + + bool IsObject() const { return (type_ == OBJECT_TYPE); } + + // Use this function if you want to have number value as double. + double GetNumberAsDouble() const { + if (type_ == INT_TYPE) { + return double(int_value_); + } else { + return real_value_; + } + } + + // Use this function if you want to have number value as int. + // TODO(syoyo): Support int value larger than 32 bits + int GetNumberAsInt() const { + if (type_ == REAL_TYPE) { + return int(real_value_); + } else { + return int_value_; + } + } + + // Accessor + template + const T &Get() const; + template + T &Get(); + + // Lookup value from an array + const Value &Get(int idx) const { + static Value null_value; + assert(IsArray()); + assert(idx >= 0); + return (static_cast(idx) < array_value_.size()) + ? array_value_[static_cast(idx)] + : null_value; + } + + // Lookup value from a key-value pair + const Value &Get(const std::string &key) const { + static Value null_value; + assert(IsObject()); + Object::const_iterator it = object_value_.find(key); + return (it != object_value_.end()) ? it->second : null_value; + } + + size_t ArrayLen() const { + if (!IsArray()) return 0; + return array_value_.size(); + } + + // Valid only for object type. + bool Has(const std::string &key) const { + if (!IsObject()) return false; + Object::const_iterator it = object_value_.find(key); + return (it != object_value_.end()) ? true : false; + } + + // List keys + std::vector Keys() const { + std::vector keys; + if (!IsObject()) return keys; // empty + + for (Object::const_iterator it = object_value_.begin(); + it != object_value_.end(); ++it) { + keys.push_back(it->first); + } + + return keys; + } + + size_t Size() const { return (IsArray() ? ArrayLen() : Keys().size()); } + + bool operator==(const tinygltf::Value &other) const; + + protected: + int type_ = NULL_TYPE; + + int int_value_ = 0; + double real_value_ = 0.0; + std::string string_value_; + std::vector binary_value_; + Array array_value_; + Object object_value_; + bool boolean_value_ = false; +}; + +#ifdef __clang__ +#pragma clang diagnostic pop +#endif + +#define TINYGLTF_VALUE_GET(ctype, var) \ + template <> \ + inline const ctype &Value::Get() const { \ + return var; \ + } \ + template <> \ + inline ctype &Value::Get() { \ + return var; \ + } +TINYGLTF_VALUE_GET(bool, boolean_value_) +TINYGLTF_VALUE_GET(double, real_value_) +TINYGLTF_VALUE_GET(int, int_value_) +TINYGLTF_VALUE_GET(std::string, string_value_) +TINYGLTF_VALUE_GET(std::vector, binary_value_) +TINYGLTF_VALUE_GET(Value::Array, array_value_) +TINYGLTF_VALUE_GET(Value::Object, object_value_) +#undef TINYGLTF_VALUE_GET + +#ifdef __clang__ +#pragma clang diagnostic push +#pragma clang diagnostic ignored "-Wc++98-compat" +#pragma clang diagnostic ignored "-Wpadded" +#endif + +/// Agregate object for representing a color +using ColorValue = std::array; + +// === legacy interface ==== +// TODO(syoyo): Deprecate `Parameter` class. +struct Parameter { + bool bool_value = false; + bool has_number_value = false; + std::string string_value; + std::vector number_array; + std::map json_double_value; + double number_value = 0.0; + + // context sensitive methods. depending the type of the Parameter you are + // accessing, these are either valid or not + // If this parameter represent a texture map in a material, will return the + // texture index + + /// Return the index of a texture if this Parameter is a texture map. + /// Returned value is only valid if the parameter represent a texture from a + /// material + int TextureIndex() const { + const auto it = json_double_value.find("index"); + if (it != std::end(json_double_value)) { + return int(it->second); + } + return -1; + } + + /// Return the index of a texture coordinate set if this Parameter is a + /// texture map. Returned value is only valid if the parameter represent a + /// texture from a material + int TextureTexCoord() const { + const auto it = json_double_value.find("texCoord"); + if (it != std::end(json_double_value)) { + return int(it->second); + } + // As per the spec, if texCoord is ommited, this parameter is 0 + return 0; + } + + /// Return the scale of a texture if this Parameter is a normal texture map. + /// Returned value is only valid if the parameter represent a normal texture + /// from a material + double TextureScale() const { + const auto it = json_double_value.find("scale"); + if (it != std::end(json_double_value)) { + return it->second; + } + // As per the spec, if scale is ommited, this paramter is 1 + return 1; + } + + /// Return the strength of a texture if this Parameter is a an occlusion map. + /// Returned value is only valid if the parameter represent an occlusion map + /// from a material + double TextureStrength() const { + const auto it = json_double_value.find("strength"); + if (it != std::end(json_double_value)) { + return it->second; + } + // As per the spec, if strenghth is ommited, this parameter is 1 + return 1; + } + + /// Material factor, like the roughness or metalness of a material + /// Returned value is only valid if the parameter represent a texture from a + /// material + double Factor() const { return number_value; } + + /// Return the color of a material + /// Returned value is only valid if the parameter represent a texture from a + /// material + ColorValue ColorFactor() const { + return { + {// this agregate intialize the std::array object, and uses C++11 RVO. + number_array[0], number_array[1], number_array[2], + (number_array.size() > 3 ? number_array[3] : 1.0)}}; + } + + Parameter() = default; + DEFAULT_METHODS(Parameter) + bool operator==(const Parameter &) const; +}; + +#ifdef __clang__ +#pragma clang diagnostic pop +#endif + +#ifdef __clang__ +#pragma clang diagnostic push +#pragma clang diagnostic ignored "-Wpadded" +#endif + +typedef std::map ParameterMap; +typedef std::map ExtensionMap; + +struct AnimationChannel { + int sampler; // required + int target_node; // required (index of the node to target) + std::string target_path; // required in ["translation", "rotation", "scale", + // "weights"] + Value extras; + ExtensionMap extensions; + ExtensionMap target_extensions; + + // Filled when SetStoreOriginalJSONForExtrasAndExtensions is enabled. + std::string extras_json_string; + std::string extensions_json_string; + std::string target_extensions_json_string; + + AnimationChannel() : sampler(-1), target_node(-1) {} + DEFAULT_METHODS(AnimationChannel) + bool operator==(const AnimationChannel &) const; +}; + +struct AnimationSampler { + int input; // required + int output; // required + std::string interpolation; // "LINEAR", "STEP","CUBICSPLINE" or user defined + // string. default "LINEAR" + Value extras; + ExtensionMap extensions; + + // Filled when SetStoreOriginalJSONForExtrasAndExtensions is enabled. + std::string extras_json_string; + std::string extensions_json_string; + + AnimationSampler() : input(-1), output(-1), interpolation("LINEAR") {} + DEFAULT_METHODS(AnimationSampler) + bool operator==(const AnimationSampler &) const; +}; + +struct Animation { + std::string name; + std::vector channels; + std::vector samplers; + Value extras; + ExtensionMap extensions; + + // Filled when SetStoreOriginalJSONForExtrasAndExtensions is enabled. + std::string extras_json_string; + std::string extensions_json_string; + + Animation() = default; + DEFAULT_METHODS(Animation) + bool operator==(const Animation &) const; +}; + +struct Skin { + std::string name; + int inverseBindMatrices; // required here but not in the spec + int skeleton; // The index of the node used as a skeleton root + std::vector joints; // Indices of skeleton nodes + + Value extras; + ExtensionMap extensions; + + // Filled when SetStoreOriginalJSONForExtrasAndExtensions is enabled. + std::string extras_json_string; + std::string extensions_json_string; + + Skin() { + inverseBindMatrices = -1; + skeleton = -1; + } + DEFAULT_METHODS(Skin) + bool operator==(const Skin &) const; +}; + +struct Sampler { + std::string name; + // glTF 2.0 spec does not define default value for `minFilter` and + // `magFilter`. Set -1 in TinyGLTF(issue #186) + int minFilter = + -1; // optional. -1 = no filter defined. ["NEAREST", "LINEAR", + // "NEAREST_MIPMAP_NEAREST", "LINEAR_MIPMAP_NEAREST", + // "NEAREST_MIPMAP_LINEAR", "LINEAR_MIPMAP_LINEAR"] + int magFilter = + -1; // optional. -1 = no filter defined. ["NEAREST", "LINEAR"] + int wrapS = + TINYGLTF_TEXTURE_WRAP_REPEAT; // ["CLAMP_TO_EDGE", "MIRRORED_REPEAT", + // "REPEAT"], default "REPEAT" + int wrapT = + TINYGLTF_TEXTURE_WRAP_REPEAT; // ["CLAMP_TO_EDGE", "MIRRORED_REPEAT", + // "REPEAT"], default "REPEAT" + //int wrapR = TINYGLTF_TEXTURE_WRAP_REPEAT; // TinyGLTF extension. currently not used. + + Value extras; + ExtensionMap extensions; + + // Filled when SetStoreOriginalJSONForExtrasAndExtensions is enabled. + std::string extras_json_string; + std::string extensions_json_string; + + Sampler() + : minFilter(-1), + magFilter(-1), + wrapS(TINYGLTF_TEXTURE_WRAP_REPEAT), + wrapT(TINYGLTF_TEXTURE_WRAP_REPEAT) {} + DEFAULT_METHODS(Sampler) + bool operator==(const Sampler &) const; +}; + +struct Image { + std::string name; + int width; + int height; + int component; + int bits; // bit depth per channel. 8(byte), 16 or 32. + int pixel_type; // pixel type(TINYGLTF_COMPONENT_TYPE_***). usually + // UBYTE(bits = 8) or USHORT(bits = 16) + std::vector image; + int bufferView; // (required if no uri) + std::string mimeType; // (required if no uri) ["image/jpeg", "image/png", + // "image/bmp", "image/gif"] + std::string uri; // (required if no mimeType) uri is not decoded(e.g. + // whitespace may be represented as %20) + Value extras; + ExtensionMap extensions; + + // Filled when SetStoreOriginalJSONForExtrasAndExtensions is enabled. + std::string extras_json_string; + std::string extensions_json_string; + + // When this flag is true, data is stored to `image` in as-is format(e.g. jpeg + // compressed for "image/jpeg" mime) This feature is good if you use custom + // image loader function. (e.g. delayed decoding of images for faster glTF + // parsing) Default parser for Image does not provide as-is loading feature at + // the moment. (You can manipulate this by providing your own LoadImageData + // function) + bool as_is; + + Image() : as_is(false) { + bufferView = -1; + width = -1; + height = -1; + component = -1; + bits = -1; + pixel_type = -1; + } + DEFAULT_METHODS(Image) + + bool operator==(const Image &) const; +}; + +struct Texture { + std::string name; + + int sampler; + int source; + Value extras; + ExtensionMap extensions; + + // Filled when SetStoreOriginalJSONForExtrasAndExtensions is enabled. + std::string extras_json_string; + std::string extensions_json_string; + + Texture() : sampler(-1), source(-1) {} + DEFAULT_METHODS(Texture) + + bool operator==(const Texture &) const; +}; + +struct TextureInfo { + int index = -1; // required. + int texCoord; // The set index of texture's TEXCOORD attribute used for + // texture coordinate mapping. + + Value extras; + ExtensionMap extensions; + + // Filled when SetStoreOriginalJSONForExtrasAndExtensions is enabled. + std::string extras_json_string; + std::string extensions_json_string; + + TextureInfo() : index(-1), texCoord(0) {} + DEFAULT_METHODS(TextureInfo) + bool operator==(const TextureInfo &) const; +}; + +struct NormalTextureInfo { + int index = -1; // required + int texCoord; // The set index of texture's TEXCOORD attribute used for + // texture coordinate mapping. + double scale; // scaledNormal = normalize(( + // * 2.0 - 1.0) * vec3(, , 1.0)) + + Value extras; + ExtensionMap extensions; + + // Filled when SetStoreOriginalJSONForExtrasAndExtensions is enabled. + std::string extras_json_string; + std::string extensions_json_string; + + NormalTextureInfo() : index(-1), texCoord(0), scale(1.0) {} + DEFAULT_METHODS(NormalTextureInfo) + bool operator==(const NormalTextureInfo &) const; +}; + +struct OcclusionTextureInfo { + int index = -1; // required + int texCoord; // The set index of texture's TEXCOORD attribute used for + // texture coordinate mapping. + double strength; // occludedColor = lerp(color, color * , ) + + Value extras; + ExtensionMap extensions; + + // Filled when SetStoreOriginalJSONForExtrasAndExtensions is enabled. + std::string extras_json_string; + std::string extensions_json_string; + + OcclusionTextureInfo() : index(-1), texCoord(0), strength(1.0) {} + DEFAULT_METHODS(OcclusionTextureInfo) + bool operator==(const OcclusionTextureInfo &) const; +}; + +// pbrMetallicRoughness class defined in glTF 2.0 spec. +struct PbrMetallicRoughness { + std::vector baseColorFactor; // len = 4. default [1,1,1,1] + TextureInfo baseColorTexture; + double metallicFactor; // default 1 + double roughnessFactor; // default 1 + TextureInfo metallicRoughnessTexture; + + Value extras; + ExtensionMap extensions; + + // Filled when SetStoreOriginalJSONForExtrasAndExtensions is enabled. + std::string extras_json_string; + std::string extensions_json_string; + + PbrMetallicRoughness() + : baseColorFactor(std::vector{1.0, 1.0, 1.0, 1.0}), + metallicFactor(1.0), + roughnessFactor(1.0) {} + DEFAULT_METHODS(PbrMetallicRoughness) + bool operator==(const PbrMetallicRoughness &) const; +}; + +// Each extension should be stored in a ParameterMap. +// members not in the values could be included in the ParameterMap +// to keep a single material model +struct Material { + std::string name; + + std::vector emissiveFactor; // length 3. default [0, 0, 0] + std::string alphaMode; // default "OPAQUE" + double alphaCutoff; // default 0.5 + bool doubleSided; // default false; + + PbrMetallicRoughness pbrMetallicRoughness; + + NormalTextureInfo normalTexture; + OcclusionTextureInfo occlusionTexture; + TextureInfo emissiveTexture; + + // For backward compatibility + // TODO(syoyo): Remove `values` and `additionalValues` in the next release. + ParameterMap values; + ParameterMap additionalValues; + + ExtensionMap extensions; + Value extras; + + // Filled when SetStoreOriginalJSONForExtrasAndExtensions is enabled. + std::string extras_json_string; + std::string extensions_json_string; + + Material() : alphaMode("OPAQUE"), alphaCutoff(0.5), doubleSided(false) {} + DEFAULT_METHODS(Material) + + bool operator==(const Material &) const; +}; + +struct BufferView { + std::string name; + int buffer{-1}; // Required + size_t byteOffset{0}; // minimum 0, default 0 + size_t byteLength{0}; // required, minimum 1. 0 = invalid + size_t byteStride{0}; // minimum 4, maximum 252 (multiple of 4), default 0 = + // understood to be tightly packed + int target{0}; // ["ARRAY_BUFFER", "ELEMENT_ARRAY_BUFFER"] for vertex indices + // or atttribs. Could be 0 for other data + Value extras; + ExtensionMap extensions; + + // Filled when SetStoreOriginalJSONForExtrasAndExtensions is enabled. + std::string extras_json_string; + std::string extensions_json_string; + + bool dracoDecoded{false}; // Flag indicating this has been draco decoded + + BufferView() + : buffer(-1), + byteOffset(0), + byteLength(0), + byteStride(0), + target(0), + dracoDecoded(false) {} + DEFAULT_METHODS(BufferView) + bool operator==(const BufferView &) const; +}; + +struct Accessor { + int bufferView; // optional in spec but required here since sparse accessor + // are not supported + std::string name; + size_t byteOffset; + bool normalized; // optional. + int componentType; // (required) One of TINYGLTF_COMPONENT_TYPE_*** + size_t count; // required + int type; // (required) One of TINYGLTF_TYPE_*** .. + Value extras; + ExtensionMap extensions; + + // Filled when SetStoreOriginalJSONForExtrasAndExtensions is enabled. + std::string extras_json_string; + std::string extensions_json_string; + + std::vector + minValues; // optional. integer value is promoted to double + std::vector + maxValues; // optional. integer value is promoted to double + + struct { + int count; + bool isSparse; + struct { + int byteOffset; + int bufferView; + int componentType; // a TINYGLTF_COMPONENT_TYPE_ value + } indices; + struct { + int bufferView; + int byteOffset; + } values; + } sparse; + + /// + /// Utility function to compute byteStride for a given bufferView object. + /// Returns -1 upon invalid glTF value or parameter configuration. + /// + int ByteStride(const BufferView &bufferViewObject) const { + if (bufferViewObject.byteStride == 0) { + // Assume data is tightly packed. + int componentSizeInBytes = + GetComponentSizeInBytes(static_cast(componentType)); + if (componentSizeInBytes <= 0) { + return -1; + } + + int numComponents = GetNumComponentsInType(static_cast(type)); + if (numComponents <= 0) { + return -1; + } + + return componentSizeInBytes * numComponents; + } else { + // Check if byteStride is a mulple of the size of the accessor's component + // type. + int componentSizeInBytes = + GetComponentSizeInBytes(static_cast(componentType)); + if (componentSizeInBytes <= 0) { + return -1; + } + + if ((bufferViewObject.byteStride % uint32_t(componentSizeInBytes)) != 0) { + return -1; + } + return static_cast(bufferViewObject.byteStride); + } + + // unreachable return 0; + } + + Accessor() + : bufferView(-1), + byteOffset(0), + normalized(false), + componentType(-1), + count(0), + type(-1) { + sparse.isSparse = false; + } + DEFAULT_METHODS(Accessor) + bool operator==(const tinygltf::Accessor &) const; +}; + +struct PerspectiveCamera { + double aspectRatio; // min > 0 + double yfov; // required. min > 0 + double zfar; // min > 0 + double znear; // required. min > 0 + + PerspectiveCamera() + : aspectRatio(0.0), + yfov(0.0), + zfar(0.0) // 0 = use infinite projecton matrix + , + znear(0.0) {} + DEFAULT_METHODS(PerspectiveCamera) + bool operator==(const PerspectiveCamera &) const; + + ExtensionMap extensions; + Value extras; + + // Filled when SetStoreOriginalJSONForExtrasAndExtensions is enabled. + std::string extras_json_string; + std::string extensions_json_string; +}; + +struct OrthographicCamera { + double xmag; // required. must not be zero. + double ymag; // required. must not be zero. + double zfar; // required. `zfar` must be greater than `znear`. + double znear; // required + + OrthographicCamera() : xmag(0.0), ymag(0.0), zfar(0.0), znear(0.0) {} + DEFAULT_METHODS(OrthographicCamera) + bool operator==(const OrthographicCamera &) const; + + ExtensionMap extensions; + Value extras; + + // Filled when SetStoreOriginalJSONForExtrasAndExtensions is enabled. + std::string extras_json_string; + std::string extensions_json_string; +}; + +struct Camera { + std::string type; // required. "perspective" or "orthographic" + std::string name; + + PerspectiveCamera perspective; + OrthographicCamera orthographic; + + Camera() {} + DEFAULT_METHODS(Camera) + bool operator==(const Camera &) const; + + ExtensionMap extensions; + Value extras; + + // Filled when SetStoreOriginalJSONForExtrasAndExtensions is enabled. + std::string extras_json_string; + std::string extensions_json_string; +}; + +struct Primitive { + std::map attributes; // (required) A dictionary object of + // integer, where each integer + // is the index of the accessor + // containing an attribute. + int material; // The index of the material to apply to this primitive + // when rendering. + int indices; // The index of the accessor that contains the indices. + int mode; // one of TINYGLTF_MODE_*** + std::vector > targets; // array of morph targets, + // where each target is a dict with attribues in ["POSITION, "NORMAL", + // "TANGENT"] pointing + // to their corresponding accessors + ExtensionMap extensions; + Value extras; + + // Filled when SetStoreOriginalJSONForExtrasAndExtensions is enabled. + std::string extras_json_string; + std::string extensions_json_string; + + Primitive() { + material = -1; + indices = -1; + mode = -1; + } + DEFAULT_METHODS(Primitive) + bool operator==(const Primitive &) const; +}; + +struct Mesh { + std::string name; + std::vector primitives; + std::vector weights; // weights to be applied to the Morph Targets + ExtensionMap extensions; + Value extras; + + // Filled when SetStoreOriginalJSONForExtrasAndExtensions is enabled. + std::string extras_json_string; + std::string extensions_json_string; + + Mesh() = default; + DEFAULT_METHODS(Mesh) + bool operator==(const Mesh &) const; +}; + +class Node { + public: + Node() : camera(-1), skin(-1), mesh(-1) {} + + DEFAULT_METHODS(Node) + + bool operator==(const Node &) const; + + int camera; // the index of the camera referenced by this node + + std::string name; + int skin; + int mesh; + std::vector children; + std::vector rotation; // length must be 0 or 4 + std::vector scale; // length must be 0 or 3 + std::vector translation; // length must be 0 or 3 + std::vector matrix; // length must be 0 or 16 + std::vector weights; // The weights of the instantiated Morph Target + + ExtensionMap extensions; + Value extras; + + // Filled when SetStoreOriginalJSONForExtrasAndExtensions is enabled. + std::string extras_json_string; + std::string extensions_json_string; +}; + +struct Buffer { + std::string name; + std::vector data; + std::string + uri; // considered as required here but not in the spec (need to clarify) + // uri is not decoded(e.g. whitespace may be represented as %20) + Value extras; + ExtensionMap extensions; + + // Filled when SetStoreOriginalJSONForExtrasAndExtensions is enabled. + std::string extras_json_string; + std::string extensions_json_string; + + Buffer() = default; + DEFAULT_METHODS(Buffer) + bool operator==(const Buffer &) const; +}; + +struct Asset { + std::string version = "2.0"; // required + std::string generator; + std::string minVersion; + std::string copyright; + ExtensionMap extensions; + Value extras; + + // Filled when SetStoreOriginalJSONForExtrasAndExtensions is enabled. + std::string extras_json_string; + std::string extensions_json_string; + + Asset() = default; + DEFAULT_METHODS(Asset) + bool operator==(const Asset &) const; +}; + +struct Scene { + std::string name; + std::vector nodes; + + ExtensionMap extensions; + Value extras; + + // Filled when SetStoreOriginalJSONForExtrasAndExtensions is enabled. + std::string extras_json_string; + std::string extensions_json_string; + + Scene() = default; + DEFAULT_METHODS(Scene) + bool operator==(const Scene &) const; +}; + +struct SpotLight { + double innerConeAngle; + double outerConeAngle; + + SpotLight() : innerConeAngle(0.0), outerConeAngle(0.7853981634) {} + DEFAULT_METHODS(SpotLight) + bool operator==(const SpotLight &) const; + + ExtensionMap extensions; + Value extras; + + // Filled when SetStoreOriginalJSONForExtrasAndExtensions is enabled. + std::string extras_json_string; + std::string extensions_json_string; +}; + +struct Light { + std::string name; + std::vector color; + double intensity{1.0}; + std::string type; + double range{0.0}; // 0.0 = inifinite + SpotLight spot; + + Light() : intensity(1.0), range(0.0) {} + DEFAULT_METHODS(Light) + + bool operator==(const Light &) const; + + ExtensionMap extensions; + Value extras; + + // Filled when SetStoreOriginalJSONForExtrasAndExtensions is enabled. + std::string extras_json_string; + std::string extensions_json_string; +}; + +class Model { + public: + Model() = default; + DEFAULT_METHODS(Model) + + bool operator==(const Model &) const; + + std::vector accessors; + std::vector animations; + std::vector buffers; + std::vector bufferViews; + std::vector materials; + std::vector meshes; + std::vector nodes; + std::vector textures; + std::vector images; + std::vector skins; + std::vector samplers; + std::vector cameras; + std::vector scenes; + std::vector lights; + + int defaultScene = -1; + std::vector extensionsUsed; + std::vector extensionsRequired; + + Asset asset; + + Value extras; + ExtensionMap extensions; + + // Filled when SetStoreOriginalJSONForExtrasAndExtensions is enabled. + std::string extras_json_string; + std::string extensions_json_string; +}; + +enum SectionCheck { + NO_REQUIRE = 0x00, + REQUIRE_VERSION = 0x01, + REQUIRE_SCENE = 0x02, + REQUIRE_SCENES = 0x04, + REQUIRE_NODES = 0x08, + REQUIRE_ACCESSORS = 0x10, + REQUIRE_BUFFERS = 0x20, + REQUIRE_BUFFER_VIEWS = 0x40, + REQUIRE_ALL = 0x7f +}; + +/// +/// LoadImageDataFunction type. Signature for custom image loading callbacks. +/// +typedef bool (*LoadImageDataFunction)(Image *, const int, std::string *, + std::string *, int, int, + const unsigned char *, int, + void *user_pointer); + +/// +/// WriteImageDataFunction type. Signature for custom image writing callbacks. +/// +typedef bool (*WriteImageDataFunction)(const std::string *, const std::string *, + Image *, bool, void *); + +#ifndef TINYGLTF_NO_STB_IMAGE +// Declaration of default image loader callback +bool LoadImageData(Image *image, const int image_idx, std::string *err, + std::string *warn, int req_width, int req_height, + const unsigned char *bytes, int size, void *); +#endif + +#ifndef TINYGLTF_NO_STB_IMAGE_WRITE +// Declaration of default image writer callback +bool WriteImageData(const std::string *basepath, const std::string *filename, + Image *image, bool embedImages, void *); +#endif + +/// +/// FilExistsFunction type. Signature for custom filesystem callbacks. +/// +typedef bool (*FileExistsFunction)(const std::string &abs_filename, void *); + +/// +/// ExpandFilePathFunction type. Signature for custom filesystem callbacks. +/// +typedef std::string (*ExpandFilePathFunction)(const std::string &, void *); + +/// +/// ReadWholeFileFunction type. Signature for custom filesystem callbacks. +/// +typedef bool (*ReadWholeFileFunction)(std::vector *, + std::string *, const std::string &, + void *); + +/// +/// WriteWholeFileFunction type. Signature for custom filesystem callbacks. +/// +typedef bool (*WriteWholeFileFunction)(std::string *, const std::string &, + const std::vector &, + void *); + +/// +/// A structure containing all required filesystem callbacks and a pointer to +/// their user data. +/// +struct FsCallbacks { + FileExistsFunction FileExists; + ExpandFilePathFunction ExpandFilePath; + ReadWholeFileFunction ReadWholeFile; + WriteWholeFileFunction WriteWholeFile; + + void *user_data; // An argument that is passed to all fs callbacks +}; + +#ifndef TINYGLTF_NO_FS +// Declaration of default filesystem callbacks + +bool FileExists(const std::string &abs_filename, void *); + +/// +/// Expand file path(e.g. `~` to home directory on posix, `%APPDATA%` to +/// `C:\\Users\\tinygltf\\AppData`) +/// +/// @param[in] filepath File path string. Assume UTF-8 +/// @param[in] userdata User data. Set to `nullptr` if you don't need it. +/// +std::string ExpandFilePath(const std::string &filepath, void *userdata); + +bool ReadWholeFile(std::vector *out, std::string *err, + const std::string &filepath, void *); + +bool WriteWholeFile(std::string *err, const std::string &filepath, + const std::vector &contents, void *); +#endif + +/// +/// glTF Parser/Serialier context. +/// +class TinyGLTF { + public: +#ifdef __clang__ + #pragma clang diagnostic push +#pragma clang diagnostic ignored "-Wc++98-compat" +#endif + + TinyGLTF() : bin_data_(nullptr), bin_size_(0), is_binary_(false) {} + +#ifdef __clang__ +#pragma clang diagnostic pop +#endif + + ~TinyGLTF() {} + + /// + /// Loads glTF ASCII asset from a file. + /// Set warning message to `warn` for example it fails to load asserts. + /// Returns false and set error string to `err` if there's an error. + /// + bool LoadASCIIFromFile(Model *model, std::string *err, std::string *warn, + const std::string &filename, + unsigned int check_sections = REQUIRE_VERSION); + + /// + /// Loads glTF ASCII asset from string(memory). + /// `length` = strlen(str); + /// Set warning message to `warn` for example it fails to load asserts. + /// Returns false and set error string to `err` if there's an error. + /// + bool LoadASCIIFromString(Model *model, std::string *err, std::string *warn, + const char *str, const unsigned int length, + const std::string &base_dir, + unsigned int check_sections = REQUIRE_VERSION); + + /// + /// Loads glTF binary asset from a file. + /// Set warning message to `warn` for example it fails to load asserts. + /// Returns false and set error string to `err` if there's an error. + /// + bool LoadBinaryFromFile(Model *model, std::string *err, std::string *warn, + const std::string &filename, + unsigned int check_sections = REQUIRE_VERSION); + + /// + /// Loads glTF binary asset from memory. + /// `length` = strlen(str); + /// Set warning message to `warn` for example it fails to load asserts. + /// Returns false and set error string to `err` if there's an error. + /// + bool LoadBinaryFromMemory(Model *model, std::string *err, std::string *warn, + const unsigned char *bytes, + const unsigned int length, + const std::string &base_dir = "", + unsigned int check_sections = REQUIRE_VERSION); + + /// + /// Write glTF to stream, buffers and images will be embeded + /// + bool WriteGltfSceneToStream(Model *model, std::ostream &stream, + bool prettyPrint, bool writeBinary); + + /// + /// Write glTF to file. + /// + bool WriteGltfSceneToFile(Model *model, const std::string &filename, + bool embedImages, bool embedBuffers, + bool prettyPrint, bool writeBinary); + + /// + /// Set callback to use for loading image data + /// + void SetImageLoader(LoadImageDataFunction LoadImageData, void *user_data); + + /// + /// Unset(remove) callback of loading image data + /// + void RemoveImageLoader(); + + /// + /// Set callback to use for writing image data + /// + void SetImageWriter(WriteImageDataFunction WriteImageData, void *user_data); + + /// + /// Set callbacks to use for filesystem (fs) access and their user data + /// + void SetFsCallbacks(FsCallbacks callbacks); + + /// + /// Set serializing default values(default = false). + /// When true, default values are force serialized to .glTF. + /// This may be helpfull if you want to serialize a full description of glTF + /// data. + /// + /// TODO(LTE): Supply parsing option as function arguments to + /// `LoadASCIIFromFile()` and others, not by a class method + /// + void SetSerializeDefaultValues(const bool enabled) { + serialize_default_values_ = enabled; + } + + bool GetSerializeDefaultValues() const { return serialize_default_values_; } + + /// + /// Store original JSON string for `extras` and `extensions`. + /// This feature will be useful when the user want to reconstruct custom data + /// structure from JSON string. + /// + void SetStoreOriginalJSONForExtrasAndExtensions(const bool enabled) { + store_original_json_for_extras_and_extensions_ = enabled; + } + + bool GetStoreOriginalJSONForExtrasAndExtensions() const { + return store_original_json_for_extras_and_extensions_; + } + + /// + /// Specify whether preserve image channales when loading images or not. + /// (Not effective when the user suppy their own LoadImageData callbacks) + /// + void SetPreserveImageChannels(bool onoff) { + preserve_image_channels_ = onoff; + } + + bool GetPreserveImageChannels() const { return preserve_image_channels_; } + + private: + /// + /// Loads glTF asset from string(memory). + /// `length` = strlen(str); + /// Set warning message to `warn` for example it fails to load asserts + /// Returns false and set error string to `err` if there's an error. + /// + bool LoadFromString(Model *model, std::string *err, std::string *warn, + const char *str, const unsigned int length, + const std::string &base_dir, unsigned int check_sections); + + const unsigned char *bin_data_ = nullptr; + size_t bin_size_ = 0; + bool is_binary_ = false; + + bool serialize_default_values_ = false; ///< Serialize default values? + + bool store_original_json_for_extras_and_extensions_ = false; + + bool preserve_image_channels_ = false; /// Default false(expand channels to + /// RGBA) for backward compatibility. + + FsCallbacks fs = { +#ifndef TINYGLTF_NO_FS + &tinygltf::FileExists, &tinygltf::ExpandFilePath, + &tinygltf::ReadWholeFile, &tinygltf::WriteWholeFile, + + nullptr // Fs callback user data +#else + nullptr, nullptr, nullptr, nullptr, + + nullptr // Fs callback user data +#endif + }; + + LoadImageDataFunction LoadImageData = +#ifndef TINYGLTF_NO_STB_IMAGE + &tinygltf::LoadImageData; +#else + nullptr; +#endif + void *load_image_user_data_{nullptr}; + bool user_image_loader_{false}; + + WriteImageDataFunction WriteImageData = +#ifndef TINYGLTF_NO_STB_IMAGE_WRITE + &tinygltf::WriteImageData; +#else + nullptr; +#endif + void *write_image_user_data_{nullptr}; +}; + +#ifdef __clang__ +#pragma clang diagnostic pop // -Wpadded +#endif + +} // namespace tinygltf + +#endif // TINY_GLTF_H_ + +#if defined(TINYGLTF_IMPLEMENTATION) || defined(__INTELLISENSE__) +#include +//#include +#ifndef TINYGLTF_NO_FS +#include +#include +#endif +#include + +#ifdef __clang__ +// Disable some warnings for external files. +#pragma clang diagnostic push +#pragma clang diagnostic ignored "-Wfloat-equal" +#pragma clang diagnostic ignored "-Wexit-time-destructors" +#pragma clang diagnostic ignored "-Wconversion" +#pragma clang diagnostic ignored "-Wold-style-cast" +#pragma clang diagnostic ignored "-Wglobal-constructors" +#if __has_warning("-Wreserved-id-macro") +#pragma clang diagnostic ignored "-Wreserved-id-macro" +#endif +#pragma clang diagnostic ignored "-Wdisabled-macro-expansion" +#pragma clang diagnostic ignored "-Wpadded" +#pragma clang diagnostic ignored "-Wc++98-compat" +#pragma clang diagnostic ignored "-Wc++98-compat-pedantic" +#pragma clang diagnostic ignored "-Wdocumentation-unknown-command" +#pragma clang diagnostic ignored "-Wswitch-enum" +#pragma clang diagnostic ignored "-Wimplicit-fallthrough" +#pragma clang diagnostic ignored "-Wweak-vtables" +#pragma clang diagnostic ignored "-Wcovered-switch-default" +#if __has_warning("-Wdouble-promotion") +#pragma clang diagnostic ignored "-Wdouble-promotion" +#endif +#if __has_warning("-Wcomma") +#pragma clang diagnostic ignored "-Wcomma" +#endif +#if __has_warning("-Wzero-as-null-pointer-constant") +#pragma clang diagnostic ignored "-Wzero-as-null-pointer-constant" +#endif +#if __has_warning("-Wcast-qual") +#pragma clang diagnostic ignored "-Wcast-qual" +#endif +#if __has_warning("-Wmissing-variable-declarations") +#pragma clang diagnostic ignored "-Wmissing-variable-declarations" +#endif +#if __has_warning("-Wmissing-prototypes") +#pragma clang diagnostic ignored "-Wmissing-prototypes" +#endif +#if __has_warning("-Wcast-align") +#pragma clang diagnostic ignored "-Wcast-align" +#endif +#if __has_warning("-Wnewline-eof") +#pragma clang diagnostic ignored "-Wnewline-eof" +#endif +#if __has_warning("-Wunused-parameter") +#pragma clang diagnostic ignored "-Wunused-parameter" +#endif +#if __has_warning("-Wmismatched-tags") +#pragma clang diagnostic ignored "-Wmismatched-tags" +#endif +#if __has_warning("-Wextra-semi-stmt") +#pragma clang diagnostic ignored "-Wextra-semi-stmt" +#endif +#endif + +// Disable GCC warnigs +#ifdef __GNUC__ +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Wtype-limits" +#endif // __GNUC__ + +#ifndef TINYGLTF_NO_INCLUDE_JSON +#ifndef TINYGLTF_USE_RAPIDJSON +#include "json.hpp" +#else +#ifndef TINYGLTF_NO_INCLUDE_RAPIDJSON +#include "document.h" +#include "prettywriter.h" +#include "rapidjson.h" +#include "stringbuffer.h" +#include "writer.h" +#endif +#endif +#endif + +#ifdef TINYGLTF_ENABLE_DRACO +#include "draco/compression/decode.h" +#include "draco/core/decoder_buffer.h" +#endif + +#ifndef TINYGLTF_NO_STB_IMAGE +#ifndef TINYGLTF_NO_INCLUDE_STB_IMAGE +#include "stb_image.h" +#endif +#endif + +#ifndef TINYGLTF_NO_STB_IMAGE_WRITE +#ifndef TINYGLTF_NO_INCLUDE_STB_IMAGE_WRITE +#include "stb_image_write.h" +#endif +#endif + +#ifdef __clang__ +#pragma clang diagnostic pop +#endif + +#ifdef __GNUC__ +#pragma GCC diagnostic pop +#endif + +#ifdef _WIN32 + +// issue 143. +// Define NOMINMAX to avoid min/max defines, +// but undef it after included windows.h +#ifndef NOMINMAX +#define TINYGLTF_INTERNAL_NOMINMAX +#define NOMINMAX +#endif + +#ifndef WIN32_LEAN_AND_MEAN +#define WIN32_LEAN_AND_MEAN +#define TINYGLTF_INTERNAL_WIN32_LEAN_AND_MEAN +#endif +#include // include API for expanding a file path + +#ifdef TINYGLTF_INTERNAL_WIN32_LEAN_AND_MEAN +#undef WIN32_LEAN_AND_MEAN +#endif + +#if defined(TINYGLTF_INTERNAL_NOMINMAX) +#undef NOMINMAX +#endif + +#if defined(__GLIBCXX__) // mingw + +#include // _O_RDONLY + +#include // fstream (all sorts of IO stuff) + stdio_filebuf (=streambuf) + +#endif + +#elif !defined(__ANDROID__) && !defined(__OpenBSD__) +#include +#endif + +#if defined(__sparcv9) || defined(__powerpc__) +// Big endian +#else +#if (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) || MINIZ_X86_OR_X64_CPU +#define TINYGLTF_LITTLE_ENDIAN 1 +#endif +#endif + +namespace { +#ifdef TINYGLTF_USE_RAPIDJSON + +#ifdef TINYGLTF_USE_RAPIDJSON_CRTALLOCATOR +// This uses the RapidJSON CRTAllocator. It is thread safe and multiple +// documents may be active at once. +using json = + rapidjson::GenericValue, rapidjson::CrtAllocator>; +using json_const_iterator = json::ConstMemberIterator; +using json_const_array_iterator = json const *; +using JsonDocument = + rapidjson::GenericDocument, rapidjson::CrtAllocator>; +rapidjson::CrtAllocator s_CrtAllocator; // stateless and thread safe +rapidjson::CrtAllocator &GetAllocator() { return s_CrtAllocator; } +#else +// This uses the default RapidJSON MemoryPoolAllocator. It is very fast, but +// not thread safe. Only a single JsonDocument may be active at any one time, +// meaning only a single gltf load/save can be active any one time. +using json = rapidjson::Value; +using json_const_iterator = json::ConstMemberIterator; +using json_const_array_iterator = json const *; +rapidjson::Document *s_pActiveDocument = nullptr; +rapidjson::Document::AllocatorType &GetAllocator() { + assert(s_pActiveDocument); // Root json node must be JsonDocument type + return s_pActiveDocument->GetAllocator(); +} + +#ifdef __clang__ +#pragma clang diagnostic push +// Suppress JsonDocument(JsonDocument &&rhs) noexcept +#pragma clang diagnostic ignored "-Wunused-member-function" +#endif + +struct JsonDocument : public rapidjson::Document { + JsonDocument() { + assert(s_pActiveDocument == + nullptr); // When using default allocator, only one document can be + // active at a time, if you need multiple active at once, + // define TINYGLTF_USE_RAPIDJSON_CRTALLOCATOR + s_pActiveDocument = this; + } + JsonDocument(const JsonDocument &) = delete; + JsonDocument(JsonDocument &&rhs) noexcept + : rapidjson::Document(std::move(rhs)) { + s_pActiveDocument = this; + rhs.isNil = true; + } + ~JsonDocument() { + if (!isNil) { + s_pActiveDocument = nullptr; + } + } + + private: + bool isNil = false; +}; + +#ifdef __clang__ +#pragma clang diagnostic pop +#endif + +#endif // TINYGLTF_USE_RAPIDJSON_CRTALLOCATOR + +#else +using nlohmann::json; +using json_const_iterator = json::const_iterator; +using json_const_array_iterator = json_const_iterator; +using JsonDocument = json; +#endif + +void JsonParse(JsonDocument &doc, const char *str, size_t length, + bool throwExc = false) { +#ifdef TINYGLTF_USE_RAPIDJSON + (void)throwExc; + doc.Parse(str, length); +#else + doc = json::parse(str, str + length, nullptr, throwExc); +#endif +} +} // namespace + +#ifdef __APPLE__ +#include "TargetConditionals.h" +#endif + +#ifdef __clang__ +#pragma clang diagnostic push +#pragma clang diagnostic ignored "-Wc++98-compat" +#endif + +namespace tinygltf { + +/// +/// Internal LoadImageDataOption struct. +/// This struct is passed through `user_pointer` in LoadImageData. +/// The struct is not passed when the user supply their own LoadImageData +/// callbacks. +/// +struct LoadImageDataOption { + // true: preserve image channels(e.g. load as RGB image if the image has RGB + // channels) default `false`(channels are expanded to RGBA for backward + // compatiblity). + bool preserve_channels{false}; +}; + +// Equals function for Value, for recursivity +static bool Equals(const tinygltf::Value &one, const tinygltf::Value &other) { + if (one.Type() != other.Type()) return false; + + switch (one.Type()) { + case NULL_TYPE: + return true; + case BOOL_TYPE: + return one.Get() == other.Get(); + case REAL_TYPE: + return TINYGLTF_DOUBLE_EQUAL(one.Get(), other.Get()); + case INT_TYPE: + return one.Get() == other.Get(); + case OBJECT_TYPE: { + auto oneObj = one.Get(); + auto otherObj = other.Get(); + if (oneObj.size() != otherObj.size()) return false; + for (auto &it : oneObj) { + auto otherIt = otherObj.find(it.first); + if (otherIt == otherObj.end()) return false; + + if (!Equals(it.second, otherIt->second)) return false; + } + return true; + } + case ARRAY_TYPE: { + if (one.Size() != other.Size()) return false; + for (int i = 0; i < int(one.Size()); ++i) + if (!Equals(one.Get(i), other.Get(i))) return false; + return true; + } + case STRING_TYPE: + return one.Get() == other.Get(); + case BINARY_TYPE: + return one.Get >() == + other.Get >(); + default: { + // unhandled type + return false; + } + } +} + +// Equals function for std::vector using TINYGLTF_DOUBLE_EPSILON +static bool Equals(const std::vector &one, + const std::vector &other) { + if (one.size() != other.size()) return false; + for (int i = 0; i < int(one.size()); ++i) { + if (!TINYGLTF_DOUBLE_EQUAL(one[size_t(i)], other[size_t(i)])) return false; + } + return true; +} + +bool Accessor::operator==(const Accessor &other) const { + return this->bufferView == other.bufferView && + this->byteOffset == other.byteOffset && + this->componentType == other.componentType && + this->count == other.count && this->extensions == other.extensions && + this->extras == other.extras && + Equals(this->maxValues, other.maxValues) && + Equals(this->minValues, other.minValues) && this->name == other.name && + this->normalized == other.normalized && this->type == other.type; +} +bool Animation::operator==(const Animation &other) const { + return this->channels == other.channels && + this->extensions == other.extensions && this->extras == other.extras && + this->name == other.name && this->samplers == other.samplers; +} +bool AnimationChannel::operator==(const AnimationChannel &other) const { + return this->extensions == other.extensions && this->extras == other.extras && + this->target_node == other.target_node && + this->target_path == other.target_path && + this->sampler == other.sampler; +} +bool AnimationSampler::operator==(const AnimationSampler &other) const { + return this->extras == other.extras && this->extensions == other.extensions && + this->input == other.input && + this->interpolation == other.interpolation && + this->output == other.output; +} +bool Asset::operator==(const Asset &other) const { + return this->copyright == other.copyright && + this->extensions == other.extensions && this->extras == other.extras && + this->generator == other.generator && + this->minVersion == other.minVersion && this->version == other.version; +} +bool Buffer::operator==(const Buffer &other) const { + return this->data == other.data && this->extensions == other.extensions && + this->extras == other.extras && this->name == other.name && + this->uri == other.uri; +} +bool BufferView::operator==(const BufferView &other) const { + return this->buffer == other.buffer && this->byteLength == other.byteLength && + this->byteOffset == other.byteOffset && + this->byteStride == other.byteStride && this->name == other.name && + this->target == other.target && this->extensions == other.extensions && + this->extras == other.extras && + this->dracoDecoded == other.dracoDecoded; +} +bool Camera::operator==(const Camera &other) const { + return this->name == other.name && this->extensions == other.extensions && + this->extras == other.extras && + this->orthographic == other.orthographic && + this->perspective == other.perspective && this->type == other.type; +} +bool Image::operator==(const Image &other) const { + return this->bufferView == other.bufferView && + this->component == other.component && + this->extensions == other.extensions && this->extras == other.extras && + this->height == other.height && this->image == other.image && + this->mimeType == other.mimeType && this->name == other.name && + this->uri == other.uri && this->width == other.width; +} +bool Light::operator==(const Light &other) const { + return Equals(this->color, other.color) && this->name == other.name && + this->type == other.type; +} +bool Material::operator==(const Material &other) const { + return (this->pbrMetallicRoughness == other.pbrMetallicRoughness) && + (this->normalTexture == other.normalTexture) && + (this->occlusionTexture == other.occlusionTexture) && + (this->emissiveTexture == other.emissiveTexture) && + Equals(this->emissiveFactor, other.emissiveFactor) && + (this->alphaMode == other.alphaMode) && + TINYGLTF_DOUBLE_EQUAL(this->alphaCutoff, other.alphaCutoff) && + (this->doubleSided == other.doubleSided) && + (this->extensions == other.extensions) && + (this->extras == other.extras) && (this->values == other.values) && + (this->additionalValues == other.additionalValues) && + (this->name == other.name); +} +bool Mesh::operator==(const Mesh &other) const { + return this->extensions == other.extensions && this->extras == other.extras && + this->name == other.name && Equals(this->weights, other.weights) && + this->primitives == other.primitives; +} +bool Model::operator==(const Model &other) const { + return this->accessors == other.accessors && + this->animations == other.animations && this->asset == other.asset && + this->buffers == other.buffers && + this->bufferViews == other.bufferViews && + this->cameras == other.cameras && + this->defaultScene == other.defaultScene && + this->extensions == other.extensions && + this->extensionsRequired == other.extensionsRequired && + this->extensionsUsed == other.extensionsUsed && + this->extras == other.extras && this->images == other.images && + this->lights == other.lights && this->materials == other.materials && + this->meshes == other.meshes && this->nodes == other.nodes && + this->samplers == other.samplers && this->scenes == other.scenes && + this->skins == other.skins && this->textures == other.textures; +} +bool Node::operator==(const Node &other) const { + return this->camera == other.camera && this->children == other.children && + this->extensions == other.extensions && this->extras == other.extras && + Equals(this->matrix, other.matrix) && this->mesh == other.mesh && + this->name == other.name && Equals(this->rotation, other.rotation) && + Equals(this->scale, other.scale) && this->skin == other.skin && + Equals(this->translation, other.translation) && + Equals(this->weights, other.weights); +} +bool SpotLight::operator==(const SpotLight &other) const { + return this->extensions == other.extensions && this->extras == other.extras && + TINYGLTF_DOUBLE_EQUAL(this->innerConeAngle, other.innerConeAngle) && + TINYGLTF_DOUBLE_EQUAL(this->outerConeAngle, other.outerConeAngle); +} +bool OrthographicCamera::operator==(const OrthographicCamera &other) const { + return this->extensions == other.extensions && this->extras == other.extras && + TINYGLTF_DOUBLE_EQUAL(this->xmag, other.xmag) && + TINYGLTF_DOUBLE_EQUAL(this->ymag, other.ymag) && + TINYGLTF_DOUBLE_EQUAL(this->zfar, other.zfar) && + TINYGLTF_DOUBLE_EQUAL(this->znear, other.znear); +} +bool Parameter::operator==(const Parameter &other) const { + if (this->bool_value != other.bool_value || + this->has_number_value != other.has_number_value) + return false; + + if (!TINYGLTF_DOUBLE_EQUAL(this->number_value, other.number_value)) + return false; + + if (this->json_double_value.size() != other.json_double_value.size()) + return false; + for (auto &it : this->json_double_value) { + auto otherIt = other.json_double_value.find(it.first); + if (otherIt == other.json_double_value.end()) return false; + + if (!TINYGLTF_DOUBLE_EQUAL(it.second, otherIt->second)) return false; + } + + if (!Equals(this->number_array, other.number_array)) return false; + + if (this->string_value != other.string_value) return false; + + return true; +} +bool PerspectiveCamera::operator==(const PerspectiveCamera &other) const { + return TINYGLTF_DOUBLE_EQUAL(this->aspectRatio, other.aspectRatio) && + this->extensions == other.extensions && this->extras == other.extras && + TINYGLTF_DOUBLE_EQUAL(this->yfov, other.yfov) && + TINYGLTF_DOUBLE_EQUAL(this->zfar, other.zfar) && + TINYGLTF_DOUBLE_EQUAL(this->znear, other.znear); +} +bool Primitive::operator==(const Primitive &other) const { + return this->attributes == other.attributes && this->extras == other.extras && + this->indices == other.indices && this->material == other.material && + this->mode == other.mode && this->targets == other.targets; +} +bool Sampler::operator==(const Sampler &other) const { + return this->extensions == other.extensions && this->extras == other.extras && + this->magFilter == other.magFilter && + this->minFilter == other.minFilter && this->name == other.name && + this->wrapS == other.wrapS && + this->wrapT == other.wrapT; + + //this->wrapR == other.wrapR +} +bool Scene::operator==(const Scene &other) const { + return this->extensions == other.extensions && this->extras == other.extras && + this->name == other.name && this->nodes == other.nodes; +} +bool Skin::operator==(const Skin &other) const { + return this->extensions == other.extensions && this->extras == other.extras && + this->inverseBindMatrices == other.inverseBindMatrices && + this->joints == other.joints && this->name == other.name && + this->skeleton == other.skeleton; +} +bool Texture::operator==(const Texture &other) const { + return this->extensions == other.extensions && this->extras == other.extras && + this->name == other.name && this->sampler == other.sampler && + this->source == other.source; +} +bool TextureInfo::operator==(const TextureInfo &other) const { + return this->extensions == other.extensions && this->extras == other.extras && + this->index == other.index && this->texCoord == other.texCoord; +} +bool NormalTextureInfo::operator==(const NormalTextureInfo &other) const { + return this->extensions == other.extensions && this->extras == other.extras && + this->index == other.index && this->texCoord == other.texCoord && + TINYGLTF_DOUBLE_EQUAL(this->scale, other.scale); +} +bool OcclusionTextureInfo::operator==(const OcclusionTextureInfo &other) const { + return this->extensions == other.extensions && this->extras == other.extras && + this->index == other.index && this->texCoord == other.texCoord && + TINYGLTF_DOUBLE_EQUAL(this->strength, other.strength); +} +bool PbrMetallicRoughness::operator==(const PbrMetallicRoughness &other) const { + return this->extensions == other.extensions && this->extras == other.extras && + (this->baseColorTexture == other.baseColorTexture) && + (this->metallicRoughnessTexture == other.metallicRoughnessTexture) && + Equals(this->baseColorFactor, other.baseColorFactor) && + TINYGLTF_DOUBLE_EQUAL(this->metallicFactor, other.metallicFactor) && + TINYGLTF_DOUBLE_EQUAL(this->roughnessFactor, other.roughnessFactor); +} +bool Value::operator==(const Value &other) const { + return Equals(*this, other); +} + +static void swap4(unsigned int *val) { +#ifdef TINYGLTF_LITTLE_ENDIAN + (void)val; +#else + unsigned int tmp = *val; + unsigned char *dst = reinterpret_cast(val); + unsigned char *src = reinterpret_cast(&tmp); + + dst[0] = src[3]; + dst[1] = src[2]; + dst[2] = src[1]; + dst[3] = src[0]; +#endif +} + +static std::string JoinPath(const std::string &path0, + const std::string &path1) { + if (path0.empty()) { + return path1; + } else { + // check '/' + char lastChar = *path0.rbegin(); + if (lastChar != '/') { + return path0 + std::string("/") + path1; + } else { + return path0 + path1; + } + } +} + +static std::string FindFile(const std::vector &paths, + const std::string &filepath, FsCallbacks *fs) { + if (fs == nullptr || fs->ExpandFilePath == nullptr || + fs->FileExists == nullptr) { + // Error, fs callback[s] missing + return std::string(); + } + + for (size_t i = 0; i < paths.size(); i++) { + std::string absPath = + fs->ExpandFilePath(JoinPath(paths[i], filepath), fs->user_data); + if (fs->FileExists(absPath, fs->user_data)) { + return absPath; + } + } + + return std::string(); +} + +static std::string GetFilePathExtension(const std::string &FileName) { + if (FileName.find_last_of(".") != std::string::npos) + return FileName.substr(FileName.find_last_of(".") + 1); + return ""; +} + +static std::string GetBaseDir(const std::string &filepath) { + if (filepath.find_last_of("/\\") != std::string::npos) + return filepath.substr(0, filepath.find_last_of("/\\")); + return ""; +} + +static std::string GetBaseFilename(const std::string &filepath) { + auto idx = filepath.find_last_of("/\\"); + if (idx != std::string::npos) + return filepath.substr(idx + 1); + return filepath; +} + +std::string base64_encode(unsigned char const *, unsigned int len); +std::string base64_decode(std::string const &s); + +/* + base64.cpp and base64.h + + Copyright (C) 2004-2008 René Nyffenegger + + This source code is provided 'as-is', without any express or implied + warranty. In no event will the author be held liable for any damages + arising from the use of this software. + + Permission is granted to anyone to use this software for any purpose, + including commercial applications, and to alter it and redistribute it + freely, subject to the following restrictions: + + 1. The origin of this source code must not be misrepresented; you must not + claim that you wrote the original source code. If you use this source code + in a product, an acknowledgment in the product documentation would be + appreciated but is not required. + + 2. Altered source versions must be plainly marked as such, and must not be + misrepresented as being the original source code. + + 3. This notice may not be removed or altered from any source distribution. + + René Nyffenegger rene.nyffenegger@adp-gmbh.ch + +*/ + +#ifdef __clang__ +#pragma clang diagnostic push +#pragma clang diagnostic ignored "-Wsign-conversion" +#pragma clang diagnostic ignored "-Wconversion" +#endif + +static inline bool is_base64(unsigned char c) { + return (isalnum(c) || (c == '+') || (c == '/')); +} + +std::string base64_encode(unsigned char const *bytes_to_encode, + unsigned int in_len) { + std::string ret; + int i = 0; + int j = 0; + unsigned char char_array_3[3]; + unsigned char char_array_4[4]; + + const char *base64_chars = + "ABCDEFGHIJKLMNOPQRSTUVWXYZ" + "abcdefghijklmnopqrstuvwxyz" + "0123456789+/"; + + while (in_len--) { + char_array_3[i++] = *(bytes_to_encode++); + if (i == 3) { + char_array_4[0] = (char_array_3[0] & 0xfc) >> 2; + char_array_4[1] = + ((char_array_3[0] & 0x03) << 4) + ((char_array_3[1] & 0xf0) >> 4); + char_array_4[2] = + ((char_array_3[1] & 0x0f) << 2) + ((char_array_3[2] & 0xc0) >> 6); + char_array_4[3] = char_array_3[2] & 0x3f; + + for (i = 0; (i < 4); i++) ret += base64_chars[char_array_4[i]]; + i = 0; + } + } + + if (i) { + for (j = i; j < 3; j++) char_array_3[j] = '\0'; + + char_array_4[0] = (char_array_3[0] & 0xfc) >> 2; + char_array_4[1] = + ((char_array_3[0] & 0x03) << 4) + ((char_array_3[1] & 0xf0) >> 4); + char_array_4[2] = + ((char_array_3[1] & 0x0f) << 2) + ((char_array_3[2] & 0xc0) >> 6); + + for (j = 0; (j < i + 1); j++) ret += base64_chars[char_array_4[j]]; + + while ((i++ < 3)) ret += '='; + } + + return ret; +} + +std::string base64_decode(std::string const &encoded_string) { + int in_len = static_cast(encoded_string.size()); + int i = 0; + int j = 0; + int in_ = 0; + unsigned char char_array_4[4], char_array_3[3]; + std::string ret; + + const std::string base64_chars = + "ABCDEFGHIJKLMNOPQRSTUVWXYZ" + "abcdefghijklmnopqrstuvwxyz" + "0123456789+/"; + + while (in_len-- && (encoded_string[in_] != '=') && + is_base64(encoded_string[in_])) { + char_array_4[i++] = encoded_string[in_]; + in_++; + if (i == 4) { + for (i = 0; i < 4; i++) + char_array_4[i] = + static_cast(base64_chars.find(char_array_4[i])); + + char_array_3[0] = + (char_array_4[0] << 2) + ((char_array_4[1] & 0x30) >> 4); + char_array_3[1] = + ((char_array_4[1] & 0xf) << 4) + ((char_array_4[2] & 0x3c) >> 2); + char_array_3[2] = ((char_array_4[2] & 0x3) << 6) + char_array_4[3]; + + for (i = 0; (i < 3); i++) ret += char_array_3[i]; + i = 0; + } + } + + if (i) { + for (j = i; j < 4; j++) char_array_4[j] = 0; + + for (j = 0; j < 4; j++) + char_array_4[j] = + static_cast(base64_chars.find(char_array_4[j])); + + char_array_3[0] = (char_array_4[0] << 2) + ((char_array_4[1] & 0x30) >> 4); + char_array_3[1] = + ((char_array_4[1] & 0xf) << 4) + ((char_array_4[2] & 0x3c) >> 2); + char_array_3[2] = ((char_array_4[2] & 0x3) << 6) + char_array_4[3]; + + for (j = 0; (j < i - 1); j++) ret += char_array_3[j]; + } + + return ret; +} +#ifdef __clang__ +#pragma clang diagnostic pop +#endif + +// https://github.com/syoyo/tinygltf/issues/228 +// TODO(syoyo): Use uriparser https://uriparser.github.io/ for stricter Uri +// decoding? +// +// Uri Decoding from DLIB +// http://dlib.net/dlib/server/server_http.cpp.html +// --- dlib begin ------------------------------------------------------------ +// Copyright (C) 2003 Davis E. King (davis@dlib.net) +// License: Boost Software License +// Boost Software License - Version 1.0 - August 17th, 2003 + +// Permission is hereby granted, free of charge, to any person or organization +// obtaining a copy of the software and accompanying documentation covered by +// this license (the "Software") to use, reproduce, display, distribute, +// execute, and transmit the Software, and to prepare derivative works of the +// Software, and to permit third-parties to whom the Software is furnished to +// do so, all subject to the following: +// The copyright notices in the Software and this entire statement, including +// the above license grant, this restriction and the following disclaimer, +// must be included in all copies of the Software, in whole or in part, and +// all derivative works of the Software, unless such copies or derivative +// works are solely in the form of machine-executable object code generated by +// a source language processor. +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT +// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE +// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE, +// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. +// +namespace dlib { + +inline unsigned char from_hex(unsigned char ch) { + if (ch <= '9' && ch >= '0') + ch -= '0'; + else if (ch <= 'f' && ch >= 'a') + ch -= 'a' - 10; + else if (ch <= 'F' && ch >= 'A') + ch -= 'A' - 10; + else + ch = 0; + return ch; +} + +static const std::string urldecode(const std::string &str) { + using namespace std; + string result; + string::size_type i; + for (i = 0; i < str.size(); ++i) { + if (str[i] == '+') { + result += ' '; + } else if (str[i] == '%' && str.size() > i + 2) { + const unsigned char ch1 = + from_hex(static_cast(str[i + 1])); + const unsigned char ch2 = + from_hex(static_cast(str[i + 2])); + const unsigned char ch = static_cast((ch1 << 4) | ch2); + result += static_cast(ch); + i += 2; + } else { + result += str[i]; + } + } + return result; +} + +} // namespace dlib +// --- dlib end -------------------------------------------------------------- + +static bool LoadExternalFile(std::vector *out, std::string *err, + std::string *warn, const std::string &filename, + const std::string &basedir, bool required, + size_t reqBytes, bool checkSize, FsCallbacks *fs) { + if (fs == nullptr || fs->FileExists == nullptr || + fs->ExpandFilePath == nullptr || fs->ReadWholeFile == nullptr) { + // This is a developer error, assert() ? + if (err) { + (*err) += "FS callback[s] not set\n"; + } + return false; + } + + std::string *failMsgOut = required ? err : warn; + + out->clear(); + + std::vector paths; + paths.push_back(basedir); + paths.push_back("."); + + std::string filepath = FindFile(paths, filename, fs); + if (filepath.empty() || filename.empty()) { + if (failMsgOut) { + (*failMsgOut) += "File not found : " + filename + "\n"; + } + return false; + } + + std::vector buf; + std::string fileReadErr; + bool fileRead = + fs->ReadWholeFile(&buf, &fileReadErr, filepath, fs->user_data); + if (!fileRead) { + if (failMsgOut) { + (*failMsgOut) += + "File read error : " + filepath + " : " + fileReadErr + "\n"; + } + return false; + } + + size_t sz = buf.size(); + if (sz == 0) { + if (failMsgOut) { + (*failMsgOut) += "File is empty : " + filepath + "\n"; + } + return false; + } + + if (checkSize) { + if (reqBytes == sz) { + out->swap(buf); + return true; + } else { + std::stringstream ss; + ss << "File size mismatch : " << filepath << ", requestedBytes " + << reqBytes << ", but got " << sz << std::endl; + if (failMsgOut) { + (*failMsgOut) += ss.str(); + } + return false; + } + } + + out->swap(buf); + return true; +} + +void TinyGLTF::SetImageLoader(LoadImageDataFunction func, void *user_data) { + LoadImageData = func; + load_image_user_data_ = user_data; + user_image_loader_ = true; +} + +void TinyGLTF::RemoveImageLoader() { + LoadImageData = +#ifndef TINYGLTF_NO_STB_IMAGE + &tinygltf::LoadImageData; +#else + nullptr; +#endif + + load_image_user_data_ = nullptr; + user_image_loader_ = false; +} + +#ifndef TINYGLTF_NO_STB_IMAGE +bool LoadImageData(Image *image, const int image_idx, std::string *err, + std::string *warn, int req_width, int req_height, + const unsigned char *bytes, int size, void *user_data) { + (void)warn; + + LoadImageDataOption option; + if (user_data) { + option = *reinterpret_cast(user_data); + } + + int w = 0, h = 0, comp = 0, req_comp = 0; + + unsigned char *data = nullptr; + + // preserve_channels true: Use channels stored in the image file. + // false: force 32-bit textures for common Vulkan compatibility. It appears + // that some GPU drivers do not support 24-bit images for Vulkan + req_comp = option.preserve_channels ? 0 : 4; + int bits = 8; + int pixel_type = TINYGLTF_COMPONENT_TYPE_UNSIGNED_BYTE; + + // It is possible that the image we want to load is a 16bit per channel image + // We are going to attempt to load it as 16bit per channel, and if it worked, + // set the image data accodingly. We are casting the returned pointer into + // unsigned char, because we are representing "bytes". But we are updating + // the Image metadata to signal that this image uses 2 bytes (16bits) per + // channel: + if (stbi_is_16_bit_from_memory(bytes, size)) { + data = reinterpret_cast( + stbi_load_16_from_memory(bytes, size, &w, &h, &comp, req_comp)); + if (data) { + bits = 16; + pixel_type = TINYGLTF_COMPONENT_TYPE_UNSIGNED_SHORT; + } + } + + // at this point, if data is still NULL, it means that the image wasn't + // 16bit per channel, we are going to load it as a normal 8bit per channel + // mage as we used to do: + // if image cannot be decoded, ignore parsing and keep it by its path + // don't break in this case + // FIXME we should only enter this function if the image is embedded. If + // image->uri references + // an image file, it should be left as it is. Image loading should not be + // mandatory (to support other formats) + if (!data) data = stbi_load_from_memory(bytes, size, &w, &h, &comp, req_comp); + if (!data) { + // NOTE: you can use `warn` instead of `err` + if (err) { + (*err) += + "Unknown image format. STB cannot decode image data for image[" + + std::to_string(image_idx) + "] name = \"" + image->name + "\".\n"; + } + return false; + } + + if ((w < 1) || (h < 1)) { + stbi_image_free(data); + if (err) { + (*err) += "Invalid image data for image[" + std::to_string(image_idx) + + "] name = \"" + image->name + "\"\n"; + } + return false; + } + + if (req_width > 0) { + if (req_width != w) { + stbi_image_free(data); + if (err) { + (*err) += "Image width mismatch for image[" + + std::to_string(image_idx) + "] name = \"" + image->name + + "\"\n"; + } + return false; + } + } + + if (req_height > 0) { + if (req_height != h) { + stbi_image_free(data); + if (err) { + (*err) += "Image height mismatch. for image[" + + std::to_string(image_idx) + "] name = \"" + image->name + + "\"\n"; + } + return false; + } + } + + if (req_comp != 0) { + // loaded data has `req_comp` channels(components) + comp = req_comp; + } + + image->width = w; + image->height = h; + image->component = comp; + image->bits = bits; + image->pixel_type = pixel_type; + image->image.resize(static_cast(w * h * comp) * size_t(bits / 8)); + std::copy(data, data + w * h * comp * (bits / 8), image->image.begin()); + stbi_image_free(data); + + return true; +} +#endif + +void TinyGLTF::SetImageWriter(WriteImageDataFunction func, void *user_data) { + WriteImageData = func; + write_image_user_data_ = user_data; +} + +#ifndef TINYGLTF_NO_STB_IMAGE_WRITE +static void WriteToMemory_stbi(void *context, void *data, int size) { + std::vector *buffer = + reinterpret_cast *>(context); + + unsigned char *pData = reinterpret_cast(data); + + buffer->insert(buffer->end(), pData, pData + size); +} + +bool WriteImageData(const std::string *basepath, const std::string *filename, + Image *image, bool embedImages, void *fsPtr) { + const std::string ext = GetFilePathExtension(*filename); + + // Write image to temporary buffer + std::string header; + std::vector data; + + if (ext == "png") { + if ((image->bits != 8) || + (image->pixel_type != TINYGLTF_COMPONENT_TYPE_UNSIGNED_BYTE)) { + // Unsupported pixel format + return false; + } + + if (!stbi_write_png_to_func(WriteToMemory_stbi, &data, image->width, + image->height, image->component, + &image->image[0], 0)) { + return false; + } + header = "data:image/png;base64,"; + } else if (ext == "jpg") { + if (!stbi_write_jpg_to_func(WriteToMemory_stbi, &data, image->width, + image->height, image->component, + &image->image[0], 100)) { + return false; + } + header = "data:image/jpeg;base64,"; + } else if (ext == "bmp") { + if (!stbi_write_bmp_to_func(WriteToMemory_stbi, &data, image->width, + image->height, image->component, + &image->image[0])) { + return false; + } + header = "data:image/bmp;base64,"; + } else if (!embedImages) { + // Error: can't output requested format to file + return false; + } + + if (embedImages) { + // Embed base64-encoded image into URI + if (data.size()) { + image->uri = + header + + base64_encode(&data[0], static_cast(data.size())); + } else { + // Throw error? + } + } else { + // Write image to disc + FsCallbacks *fs = reinterpret_cast(fsPtr); + if ((fs != nullptr) && (fs->WriteWholeFile != nullptr)) { + const std::string imagefilepath = JoinPath(*basepath, *filename); + std::string writeError; + if (!fs->WriteWholeFile(&writeError, imagefilepath, data, + fs->user_data)) { + // Could not write image file to disc; Throw error ? + return false; + } + } else { + // Throw error? + } + image->uri = *filename; + } + + return true; +} +#endif + +void TinyGLTF::SetFsCallbacks(FsCallbacks callbacks) { fs = callbacks; } + +#ifdef _WIN32 +static inline std::wstring UTF8ToWchar(const std::string &str) { + int wstr_size = + MultiByteToWideChar(CP_UTF8, 0, str.data(), (int)str.size(), nullptr, 0); + std::wstring wstr(wstr_size, 0); + MultiByteToWideChar(CP_UTF8, 0, str.data(), (int)str.size(), &wstr[0], + (int)wstr.size()); + return wstr; +} + +static inline std::string WcharToUTF8(const std::wstring &wstr) { + int str_size = WideCharToMultiByte(CP_UTF8, 0, wstr.data(), (int)wstr.size(), + nullptr, 0, NULL, NULL); + std::string str(str_size, 0); + WideCharToMultiByte(CP_UTF8, 0, wstr.data(), (int)wstr.size(), &str[0], + (int)str.size(), NULL, NULL); + return str; +} +#endif + +#ifndef TINYGLTF_NO_FS +// Default implementations of filesystem functions + +bool FileExists(const std::string &abs_filename, void *) { + bool ret; +#ifdef TINYGLTF_ANDROID_LOAD_FROM_ASSETS + if (asset_manager) { + AAsset *asset = AAssetManager_open(asset_manager, abs_filename.c_str(), + AASSET_MODE_STREAMING); + if (!asset) { + return false; + } + AAsset_close(asset); + ret = true; + } else { + return false; + } +#else +#ifdef _WIN32 +#if defined(_MSC_VER) || defined(__GLIBCXX__) + FILE *fp = nullptr; + errno_t err = _wfopen_s(&fp, UTF8ToWchar(abs_filename).c_str(), L"rb"); + if (err != 0) { + return false; + } +#else + FILE *fp = nullptr; + errno_t err = fopen_s(&fp, abs_filename.c_str(), "rb"); + if (err != 0) { + return false; + } +#endif + +#else + FILE *fp = fopen(abs_filename.c_str(), "rb"); +#endif + if (fp) { + ret = true; + fclose(fp); + } else { + ret = false; + } +#endif + + return ret; +} + +std::string ExpandFilePath(const std::string &filepath, void *) { +#ifdef _WIN32 + // Assume input `filepath` is encoded in UTF-8 + std::wstring wfilepath = UTF8ToWchar(filepath); + DWORD wlen = ExpandEnvironmentStringsW(wfilepath.c_str(), nullptr, 0); + wchar_t *wstr = new wchar_t[wlen]; + ExpandEnvironmentStringsW(wfilepath.c_str(), wstr, wlen); + + std::wstring ws(wstr); + delete[] wstr; + return WcharToUTF8(ws); + +#else + +#if defined(TARGET_OS_IPHONE) || defined(TARGET_IPHONE_SIMULATOR) || \ + defined(__ANDROID__) || defined(__EMSCRIPTEN__) || defined(__OpenBSD__) + // no expansion + std::string s = filepath; +#else + std::string s; + wordexp_t p; + + if (filepath.empty()) { + return ""; + } + + // Quote the string to keep any spaces in filepath intact. + std::string quoted_path = "\"" + filepath + "\""; + // char** w; + int ret = wordexp(quoted_path.c_str(), &p, 0); + if (ret) { + // err + s = filepath; + return s; + } + + // Use first element only. + if (p.we_wordv) { + s = std::string(p.we_wordv[0]); + wordfree(&p); + } else { + s = filepath; + } + +#endif + + return s; +#endif +} + +bool ReadWholeFile(std::vector *out, std::string *err, + const std::string &filepath, void *) { +#ifdef TINYGLTF_ANDROID_LOAD_FROM_ASSETS + if (asset_manager) { + AAsset *asset = AAssetManager_open(asset_manager, filepath.c_str(), + AASSET_MODE_STREAMING); + if (!asset) { + if (err) { + (*err) += "File open error : " + filepath + "\n"; + } + return false; + } + size_t size = AAsset_getLength(asset); + if (size == 0) { + if (err) { + (*err) += "Invalid file size : " + filepath + + " (does the path point to a directory?)"; + } + return false; + } + out->resize(size); + AAsset_read(asset, reinterpret_cast(&out->at(0)), size); + AAsset_close(asset); + return true; + } else { + if (err) { + (*err) += "No asset manager specified : " + filepath + "\n"; + } + return false; + } +#else +#ifdef _WIN32 +#if defined(__GLIBCXX__) // mingw + int file_descriptor = + _wopen(UTF8ToWchar(filepath).c_str(), _O_RDONLY | _O_BINARY); + __gnu_cxx::stdio_filebuf wfile_buf(file_descriptor, std::ios_base::in); + std::istream f(&wfile_buf); +#elif defined(_MSC_VER) || defined(_LIBCPP_VERSION) + // For libcxx, assume _LIBCPP_HAS_OPEN_WITH_WCHAR is defined to accept + // `wchar_t *` + std::ifstream f(UTF8ToWchar(filepath).c_str(), std::ifstream::binary); +#else + // Unknown compiler/runtime + std::ifstream f(filepath.c_str(), std::ifstream::binary); +#endif +#else + std::ifstream f(filepath.c_str(), std::ifstream::binary); +#endif + if (!f) { + if (err) { + (*err) += "File open error : " + filepath + "\n"; + } + return false; + } + + f.seekg(0, f.end); + size_t sz = static_cast(f.tellg()); + f.seekg(0, f.beg); + + if (int64_t(sz) < 0) { + if (err) { + (*err) += "Invalid file size : " + filepath + + " (does the path point to a directory?)"; + } + return false; + } else if (sz == 0) { + if (err) { + (*err) += "File is empty : " + filepath + "\n"; + } + return false; + } + + out->resize(sz); + f.read(reinterpret_cast(&out->at(0)), + static_cast(sz)); + + return true; +#endif +} + +bool WriteWholeFile(std::string *err, const std::string &filepath, + const std::vector &contents, void *) { +#ifdef _WIN32 +#if defined(__GLIBCXX__) // mingw + int file_descriptor = _wopen(UTF8ToWchar(filepath).c_str(), + _O_CREAT | _O_WRONLY | _O_TRUNC | _O_BINARY); + __gnu_cxx::stdio_filebuf wfile_buf( + file_descriptor, std::ios_base::out | std::ios_base::binary); + std::ostream f(&wfile_buf); +#elif defined(_MSC_VER) + std::ofstream f(UTF8ToWchar(filepath).c_str(), std::ofstream::binary); +#else // clang? + std::ofstream f(filepath.c_str(), std::ofstream::binary); +#endif +#else + std::ofstream f(filepath.c_str(), std::ofstream::binary); +#endif + if (!f) { + if (err) { + (*err) += "File open error for writing : " + filepath + "\n"; + } + return false; + } + + f.write(reinterpret_cast(&contents.at(0)), + static_cast(contents.size())); + if (!f) { + if (err) { + (*err) += "File write error: " + filepath + "\n"; + } + return false; + } + + return true; +} + +#endif // TINYGLTF_NO_FS + +static std::string MimeToExt(const std::string &mimeType) { + if (mimeType == "image/jpeg") { + return "jpg"; + } else if (mimeType == "image/png") { + return "png"; + } else if (mimeType == "image/bmp") { + return "bmp"; + } else if (mimeType == "image/gif") { + return "gif"; + } + + return ""; +} + +static void UpdateImageObject(Image &image, std::string &baseDir, int index, + bool embedImages, + WriteImageDataFunction *WriteImageData = nullptr, + void *user_data = nullptr) { + std::string filename; + std::string ext; + // If image has uri, use it it as a filename + if (image.uri.size()) { + filename = GetBaseFilename(image.uri); + ext = GetFilePathExtension(filename); + } else if (image.bufferView != -1) { + // If there's no URI and the data exists in a buffer, + // don't change properties or write images + } else if (image.name.size()) { + ext = MimeToExt(image.mimeType); + // Otherwise use name as filename + filename = image.name + "." + ext; + } else { + ext = MimeToExt(image.mimeType); + // Fallback to index of image as filename + filename = std::to_string(index) + "." + ext; + } + + // If callback is set, modify image data object + if (*WriteImageData != nullptr && !filename.empty()) { + std::string uri; + (*WriteImageData)(&baseDir, &filename, &image, embedImages, user_data); + } +} + +bool IsDataURI(const std::string &in) { + std::string header = "data:application/octet-stream;base64,"; + if (in.find(header) == 0) { + return true; + } + + header = "data:image/jpeg;base64,"; + if (in.find(header) == 0) { + return true; + } + + header = "data:image/png;base64,"; + if (in.find(header) == 0) { + return true; + } + + header = "data:image/bmp;base64,"; + if (in.find(header) == 0) { + return true; + } + + header = "data:image/gif;base64,"; + if (in.find(header) == 0) { + return true; + } + + header = "data:text/plain;base64,"; + if (in.find(header) == 0) { + return true; + } + + header = "data:application/gltf-buffer;base64,"; + if (in.find(header) == 0) { + return true; + } + + return false; +} + +bool DecodeDataURI(std::vector *out, std::string &mime_type, + const std::string &in, size_t reqBytes, bool checkSize) { + std::string header = "data:application/octet-stream;base64,"; + std::string data; + if (in.find(header) == 0) { + data = base64_decode(in.substr(header.size())); // cut mime string. + } + + if (data.empty()) { + header = "data:image/jpeg;base64,"; + if (in.find(header) == 0) { + mime_type = "image/jpeg"; + data = base64_decode(in.substr(header.size())); // cut mime string. + } + } + + if (data.empty()) { + header = "data:image/png;base64,"; + if (in.find(header) == 0) { + mime_type = "image/png"; + data = base64_decode(in.substr(header.size())); // cut mime string. + } + } + + if (data.empty()) { + header = "data:image/bmp;base64,"; + if (in.find(header) == 0) { + mime_type = "image/bmp"; + data = base64_decode(in.substr(header.size())); // cut mime string. + } + } + + if (data.empty()) { + header = "data:image/gif;base64,"; + if (in.find(header) == 0) { + mime_type = "image/gif"; + data = base64_decode(in.substr(header.size())); // cut mime string. + } + } + + if (data.empty()) { + header = "data:text/plain;base64,"; + if (in.find(header) == 0) { + mime_type = "text/plain"; + data = base64_decode(in.substr(header.size())); + } + } + + if (data.empty()) { + header = "data:application/gltf-buffer;base64,"; + if (in.find(header) == 0) { + data = base64_decode(in.substr(header.size())); + } + } + + // TODO(syoyo): Allow empty buffer? #229 + if (data.empty()) { + return false; + } + + if (checkSize) { + if (data.size() != reqBytes) { + return false; + } + out->resize(reqBytes); + } else { + out->resize(data.size()); + } + std::copy(data.begin(), data.end(), out->begin()); + return true; +} + +namespace { +bool GetInt(const json &o, int &val) { +#ifdef TINYGLTF_USE_RAPIDJSON + if (!o.IsDouble()) { + if (o.IsInt()) { + val = o.GetInt(); + return true; + } else if (o.IsUint()) { + val = static_cast(o.GetUint()); + return true; + } else if (o.IsInt64()) { + val = static_cast(o.GetInt64()); + return true; + } else if (o.IsUint64()) { + val = static_cast(o.GetUint64()); + return true; + } + } + + return false; +#else + auto type = o.type(); + + if ((type == json::value_t::number_integer) || + (type == json::value_t::number_unsigned)) { + val = static_cast(o.get()); + return true; + } + + return false; +#endif +} + +#ifdef TINYGLTF_USE_RAPIDJSON +bool GetDouble(const json &o, double &val) { + if (o.IsDouble()) { + val = o.GetDouble(); + return true; + } + + return false; +} +#endif + +bool GetNumber(const json &o, double &val) { +#ifdef TINYGLTF_USE_RAPIDJSON + if (o.IsNumber()) { + val = o.GetDouble(); + return true; + } + + return false; +#else + if (o.is_number()) { + val = o.get(); + return true; + } + + return false; +#endif +} + +bool GetString(const json &o, std::string &val) { +#ifdef TINYGLTF_USE_RAPIDJSON + if (o.IsString()) { + val = o.GetString(); + return true; + } + + return false; +#else + if (o.type() == json::value_t::string) { + val = o.get(); + return true; + } + + return false; +#endif +} + +bool IsArray(const json &o) { +#ifdef TINYGLTF_USE_RAPIDJSON + return o.IsArray(); +#else + return o.is_array(); +#endif +} + +json_const_array_iterator ArrayBegin(const json &o) { +#ifdef TINYGLTF_USE_RAPIDJSON + return o.Begin(); +#else + return o.begin(); +#endif +} + +json_const_array_iterator ArrayEnd(const json &o) { +#ifdef TINYGLTF_USE_RAPIDJSON + return o.End(); +#else + return o.end(); +#endif +} + +bool IsObject(const json &o) { +#ifdef TINYGLTF_USE_RAPIDJSON + return o.IsObject(); +#else + return o.is_object(); +#endif +} + +json_const_iterator ObjectBegin(const json &o) { +#ifdef TINYGLTF_USE_RAPIDJSON + return o.MemberBegin(); +#else + return o.begin(); +#endif +} + +json_const_iterator ObjectEnd(const json &o) { +#ifdef TINYGLTF_USE_RAPIDJSON + return o.MemberEnd(); +#else + return o.end(); +#endif +} + +// Making this a const char* results in a pointer to a temporary when +// TINYGLTF_USE_RAPIDJSON is off. +std::string GetKey(json_const_iterator &it) { +#ifdef TINYGLTF_USE_RAPIDJSON + return it->name.GetString(); +#else + return it.key().c_str(); +#endif +} + +bool FindMember(const json &o, const char *member, json_const_iterator &it) { +#ifdef TINYGLTF_USE_RAPIDJSON + if (!o.IsObject()) { + return false; + } + it = o.FindMember(member); + return it != o.MemberEnd(); +#else + it = o.find(member); + return it != o.end(); +#endif +} + +const json &GetValue(json_const_iterator &it) { +#ifdef TINYGLTF_USE_RAPIDJSON + return it->value; +#else + return it.value(); +#endif +} + +std::string JsonToString(const json &o, int spacing = -1) { +#ifdef TINYGLTF_USE_RAPIDJSON + using namespace rapidjson; + StringBuffer buffer; + if (spacing == -1) { + Writer writer(buffer); + o.Accept(writer); + } else { + PrettyWriter writer(buffer); + writer.SetIndent(' ', uint32_t(spacing)); + o.Accept(writer); + } + return buffer.GetString(); +#else + return o.dump(spacing); +#endif +} + +} // namespace + +static bool ParseJsonAsValue(Value *ret, const json &o) { + Value val{}; +#ifdef TINYGLTF_USE_RAPIDJSON + using rapidjson::Type; + switch (o.GetType()) { + case Type::kObjectType: { + Value::Object value_object; + for (auto it = o.MemberBegin(); it != o.MemberEnd(); ++it) { + Value entry; + ParseJsonAsValue(&entry, it->value); + if (entry.Type() != NULL_TYPE) + value_object.emplace(GetKey(it), std::move(entry)); + } + if (value_object.size() > 0) val = Value(std::move(value_object)); + } break; + case Type::kArrayType: { + Value::Array value_array; + value_array.reserve(o.Size()); + for (auto it = o.Begin(); it != o.End(); ++it) { + Value entry; + ParseJsonAsValue(&entry, *it); + if (entry.Type() != NULL_TYPE) + value_array.emplace_back(std::move(entry)); + } + if (value_array.size() > 0) val = Value(std::move(value_array)); + } break; + case Type::kStringType: + val = Value(std::string(o.GetString())); + break; + case Type::kFalseType: + case Type::kTrueType: + val = Value(o.GetBool()); + break; + case Type::kNumberType: + if (!o.IsDouble()) { + int i = 0; + GetInt(o, i); + val = Value(i); + } else { + double d = 0.0; + GetDouble(o, d); + val = Value(d); + } + break; + case Type::kNullType: + break; + // all types are covered, so no `case default` + } +#else + switch (o.type()) { + case json::value_t::object: { + Value::Object value_object; + for (auto it = o.begin(); it != o.end(); it++) { + Value entry; + ParseJsonAsValue(&entry, it.value()); + if (entry.Type() != NULL_TYPE) + value_object.emplace(it.key(), std::move(entry)); + } + if (value_object.size() > 0) val = Value(std::move(value_object)); + } break; + case json::value_t::array: { + Value::Array value_array; + value_array.reserve(o.size()); + for (auto it = o.begin(); it != o.end(); it++) { + Value entry; + ParseJsonAsValue(&entry, it.value()); + if (entry.Type() != NULL_TYPE) + value_array.emplace_back(std::move(entry)); + } + if (value_array.size() > 0) val = Value(std::move(value_array)); + } break; + case json::value_t::string: + val = Value(o.get()); + break; + case json::value_t::boolean: + val = Value(o.get()); + break; + case json::value_t::number_integer: + case json::value_t::number_unsigned: + val = Value(static_cast(o.get())); + break; + case json::value_t::number_float: + val = Value(o.get()); + break; + case json::value_t::null: + case json::value_t::discarded: + case json::value_t::binary: + // default: + break; + } +#endif + if (ret) *ret = std::move(val); + + return val.Type() != NULL_TYPE; +} + +static bool ParseExtrasProperty(Value *ret, const json &o) { + json_const_iterator it; + if (!FindMember(o, "extras", it)) { + return false; + } + + return ParseJsonAsValue(ret, GetValue(it)); +} + +static bool ParseBooleanProperty(bool *ret, std::string *err, const json &o, + const std::string &property, + const bool required, + const std::string &parent_node = "") { + json_const_iterator it; + if (!FindMember(o, property.c_str(), it)) { + if (required) { + if (err) { + (*err) += "'" + property + "' property is missing"; + if (!parent_node.empty()) { + (*err) += " in " + parent_node; + } + (*err) += ".\n"; + } + } + return false; + } + + auto &value = GetValue(it); + + bool isBoolean; + bool boolValue = false; +#ifdef TINYGLTF_USE_RAPIDJSON + isBoolean = value.IsBool(); + if (isBoolean) { + boolValue = value.GetBool(); + } +#else + isBoolean = value.is_boolean(); + if (isBoolean) { + boolValue = value.get(); + } +#endif + if (!isBoolean) { + if (required) { + if (err) { + (*err) += "'" + property + "' property is not a bool type.\n"; + } + } + return false; + } + + if (ret) { + (*ret) = boolValue; + } + + return true; +} + +static bool ParseIntegerProperty(int *ret, std::string *err, const json &o, + const std::string &property, + const bool required, + const std::string &parent_node = "") { + json_const_iterator it; + if (!FindMember(o, property.c_str(), it)) { + if (required) { + if (err) { + (*err) += "'" + property + "' property is missing"; + if (!parent_node.empty()) { + (*err) += " in " + parent_node; + } + (*err) += ".\n"; + } + } + return false; + } + + int intValue; + bool isInt = GetInt(GetValue(it), intValue); + if (!isInt) { + if (required) { + if (err) { + (*err) += "'" + property + "' property is not an integer type.\n"; + } + } + return false; + } + + if (ret) { + (*ret) = intValue; + } + + return true; +} + +static bool ParseUnsignedProperty(size_t *ret, std::string *err, const json &o, + const std::string &property, + const bool required, + const std::string &parent_node = "") { + json_const_iterator it; + if (!FindMember(o, property.c_str(), it)) { + if (required) { + if (err) { + (*err) += "'" + property + "' property is missing"; + if (!parent_node.empty()) { + (*err) += " in " + parent_node; + } + (*err) += ".\n"; + } + } + return false; + } + + auto &value = GetValue(it); + + size_t uValue = 0; + bool isUValue; +#ifdef TINYGLTF_USE_RAPIDJSON + isUValue = false; + if (value.IsUint()) { + uValue = value.GetUint(); + isUValue = true; + } else if (value.IsUint64()) { + uValue = value.GetUint64(); + isUValue = true; + } +#else + isUValue = value.is_number_unsigned(); + if (isUValue) { + uValue = value.get(); + } +#endif + if (!isUValue) { + if (required) { + if (err) { + (*err) += "'" + property + "' property is not a positive integer.\n"; + } + } + return false; + } + + if (ret) { + (*ret) = uValue; + } + + return true; +} + +static bool ParseNumberProperty(double *ret, std::string *err, const json &o, + const std::string &property, + const bool required, + const std::string &parent_node = "") { + json_const_iterator it; + + if (!FindMember(o, property.c_str(), it)) { + if (required) { + if (err) { + (*err) += "'" + property + "' property is missing"; + if (!parent_node.empty()) { + (*err) += " in " + parent_node; + } + (*err) += ".\n"; + } + } + return false; + } + + double numberValue; + bool isNumber = GetNumber(GetValue(it), numberValue); + + if (!isNumber) { + if (required) { + if (err) { + (*err) += "'" + property + "' property is not a number type.\n"; + } + } + return false; + } + + if (ret) { + (*ret) = numberValue; + } + + return true; +} + +static bool ParseNumberArrayProperty(std::vector *ret, std::string *err, + const json &o, const std::string &property, + bool required, + const std::string &parent_node = "") { + json_const_iterator it; + if (!FindMember(o, property.c_str(), it)) { + if (required) { + if (err) { + (*err) += "'" + property + "' property is missing"; + if (!parent_node.empty()) { + (*err) += " in " + parent_node; + } + (*err) += ".\n"; + } + } + return false; + } + + if (!IsArray(GetValue(it))) { + if (required) { + if (err) { + (*err) += "'" + property + "' property is not an array"; + if (!parent_node.empty()) { + (*err) += " in " + parent_node; + } + (*err) += ".\n"; + } + } + return false; + } + + ret->clear(); + auto end = ArrayEnd(GetValue(it)); + for (auto i = ArrayBegin(GetValue(it)); i != end; ++i) { + double numberValue; + const bool isNumber = GetNumber(*i, numberValue); + if (!isNumber) { + if (required) { + if (err) { + (*err) += "'" + property + "' property is not a number.\n"; + if (!parent_node.empty()) { + (*err) += " in " + parent_node; + } + (*err) += ".\n"; + } + } + return false; + } + ret->push_back(numberValue); + } + + return true; +} + +static bool ParseIntegerArrayProperty(std::vector *ret, std::string *err, + const json &o, + const std::string &property, + bool required, + const std::string &parent_node = "") { + json_const_iterator it; + if (!FindMember(o, property.c_str(), it)) { + if (required) { + if (err) { + (*err) += "'" + property + "' property is missing"; + if (!parent_node.empty()) { + (*err) += " in " + parent_node; + } + (*err) += ".\n"; + } + } + return false; + } + + if (!IsArray(GetValue(it))) { + if (required) { + if (err) { + (*err) += "'" + property + "' property is not an array"; + if (!parent_node.empty()) { + (*err) += " in " + parent_node; + } + (*err) += ".\n"; + } + } + return false; + } + + ret->clear(); + auto end = ArrayEnd(GetValue(it)); + for (auto i = ArrayBegin(GetValue(it)); i != end; ++i) { + int numberValue; + bool isNumber = GetInt(*i, numberValue); + if (!isNumber) { + if (required) { + if (err) { + (*err) += "'" + property + "' property is not an integer type.\n"; + if (!parent_node.empty()) { + (*err) += " in " + parent_node; + } + (*err) += ".\n"; + } + } + return false; + } + ret->push_back(numberValue); + } + + return true; +} + +static bool ParseStringProperty( + std::string *ret, std::string *err, const json &o, + const std::string &property, bool required, + const std::string &parent_node = std::string()) { + json_const_iterator it; + if (!FindMember(o, property.c_str(), it)) { + if (required) { + if (err) { + (*err) += "'" + property + "' property is missing"; + if (parent_node.empty()) { + (*err) += ".\n"; + } else { + (*err) += " in `" + parent_node + "'.\n"; + } + } + } + return false; + } + + std::string strValue; + if (!GetString(GetValue(it), strValue)) { + if (required) { + if (err) { + (*err) += "'" + property + "' property is not a string type.\n"; + } + } + return false; + } + + if (ret) { + (*ret) = std::move(strValue); + } + + return true; +} + +static bool ParseStringIntegerProperty(std::map *ret, + std::string *err, const json &o, + const std::string &property, + bool required, + const std::string &parent = "") { + json_const_iterator it; + if (!FindMember(o, property.c_str(), it)) { + if (required) { + if (err) { + if (!parent.empty()) { + (*err) += + "'" + property + "' property is missing in " + parent + ".\n"; + } else { + (*err) += "'" + property + "' property is missing.\n"; + } + } + } + return false; + } + + const json &dict = GetValue(it); + + // Make sure we are dealing with an object / dictionary. + if (!IsObject(dict)) { + if (required) { + if (err) { + (*err) += "'" + property + "' property is not an object.\n"; + } + } + return false; + } + + ret->clear(); + + json_const_iterator dictIt(ObjectBegin(dict)); + json_const_iterator dictItEnd(ObjectEnd(dict)); + + for (; dictIt != dictItEnd; ++dictIt) { + int intVal; + if (!GetInt(GetValue(dictIt), intVal)) { + if (required) { + if (err) { + (*err) += "'" + property + "' value is not an integer type.\n"; + } + } + return false; + } + + // Insert into the list. + (*ret)[GetKey(dictIt)] = intVal; + } + return true; +} + +static bool ParseJSONProperty(std::map *ret, + std::string *err, const json &o, + const std::string &property, bool required) { + json_const_iterator it; + if (!FindMember(o, property.c_str(), it)) { + if (required) { + if (err) { + (*err) += "'" + property + "' property is missing. \n'"; + } + } + return false; + } + + const json &obj = GetValue(it); + + if (!IsObject(obj)) { + if (required) { + if (err) { + (*err) += "'" + property + "' property is not a JSON object.\n"; + } + } + return false; + } + + ret->clear(); + + json_const_iterator it2(ObjectBegin(obj)); + json_const_iterator itEnd(ObjectEnd(obj)); + for (; it2 != itEnd; ++it2) { + double numVal; + if (GetNumber(GetValue(it2), numVal)) + ret->emplace(std::string(GetKey(it2)), numVal); + } + + return true; +} + +static bool ParseParameterProperty(Parameter *param, std::string *err, + const json &o, const std::string &prop, + bool required) { + // A parameter value can either be a string or an array of either a boolean or + // a number. Booleans of any kind aren't supported here. Granted, it + // complicates the Parameter structure and breaks it semantically in the sense + // that the client probably works off the assumption that if the string is + // empty the vector is used, etc. Would a tagged union work? + if (ParseStringProperty(¶m->string_value, err, o, prop, false)) { + // Found string property. + return true; + } else if (ParseNumberArrayProperty(¶m->number_array, err, o, prop, + false)) { + // Found a number array. + return true; + } else if (ParseNumberProperty(¶m->number_value, err, o, prop, false)) { + return param->has_number_value = true; + } else if (ParseJSONProperty(¶m->json_double_value, err, o, prop, + false)) { + return true; + } else if (ParseBooleanProperty(¶m->bool_value, err, o, prop, false)) { + return true; + } else { + if (required) { + if (err) { + (*err) += "parameter must be a string or number / number array.\n"; + } + } + return false; + } +} + +static bool ParseExtensionsProperty(ExtensionMap *ret, std::string *err, + const json &o) { + (void)err; + + json_const_iterator it; + if (!FindMember(o, "extensions", it)) { + return false; + } + + auto &obj = GetValue(it); + if (!IsObject(obj)) { + return false; + } + ExtensionMap extensions; + json_const_iterator extIt = ObjectBegin(obj); // it.value().begin(); + json_const_iterator extEnd = ObjectEnd(obj); + for (; extIt != extEnd; ++extIt) { + auto &itObj = GetValue(extIt); + if (!IsObject(itObj)) continue; + std::string key(GetKey(extIt)); + if (!ParseJsonAsValue(&extensions[key], itObj)) { + if (!key.empty()) { + // create empty object so that an extension object is still of type + // object + extensions[key] = Value{Value::Object{}}; + } + } + } + if (ret) { + (*ret) = std::move(extensions); + } + return true; +} + +static bool ParseAsset(Asset *asset, std::string *err, const json &o, + bool store_original_json_for_extras_and_extensions) { + ParseStringProperty(&asset->version, err, o, "version", true, "Asset"); + ParseStringProperty(&asset->generator, err, o, "generator", false, "Asset"); + ParseStringProperty(&asset->minVersion, err, o, "minVersion", false, "Asset"); + ParseStringProperty(&asset->copyright, err, o, "copyright", false, "Asset"); + + ParseExtensionsProperty(&asset->extensions, err, o); + + // Unity exporter version is added as extra here + ParseExtrasProperty(&(asset->extras), o); + + if (store_original_json_for_extras_and_extensions) { + { + json_const_iterator it; + if (FindMember(o, "extensions", it)) { + asset->extensions_json_string = JsonToString(GetValue(it)); + } + } + { + json_const_iterator it; + if (FindMember(o, "extras", it)) { + asset->extras_json_string = JsonToString(GetValue(it)); + } + } + } + + return true; +} + +static bool ParseImage(Image *image, const int image_idx, std::string *err, + std::string *warn, const json &o, + bool store_original_json_for_extras_and_extensions, + const std::string &basedir, FsCallbacks *fs, + LoadImageDataFunction *LoadImageData = nullptr, + void *load_image_user_data = nullptr) { + // A glTF image must either reference a bufferView or an image uri + + // schema says oneOf [`bufferView`, `uri`] + // TODO(syoyo): Check the type of each parameters. + json_const_iterator it; + bool hasBufferView = FindMember(o, "bufferView", it); + bool hasURI = FindMember(o, "uri", it); + + ParseStringProperty(&image->name, err, o, "name", false); + + if (hasBufferView && hasURI) { + // Should not both defined. + if (err) { + (*err) += + "Only one of `bufferView` or `uri` should be defined, but both are " + "defined for image[" + + std::to_string(image_idx) + "] name = \"" + image->name + "\"\n"; + } + return false; + } + + if (!hasBufferView && !hasURI) { + if (err) { + (*err) += "Neither required `bufferView` nor `uri` defined for image[" + + std::to_string(image_idx) + "] name = \"" + image->name + + "\"\n"; + } + return false; + } + + ParseExtensionsProperty(&image->extensions, err, o); + ParseExtrasProperty(&image->extras, o); + + if (store_original_json_for_extras_and_extensions) { + { + json_const_iterator eit; + if (FindMember(o, "extensions", eit)) { + image->extensions_json_string = JsonToString(GetValue(eit)); + } + } + { + json_const_iterator eit; + if (FindMember(o, "extras", eit)) { + image->extras_json_string = JsonToString(GetValue(eit)); + } + } + } + + if (hasBufferView) { + int bufferView = -1; + if (!ParseIntegerProperty(&bufferView, err, o, "bufferView", true)) { + if (err) { + (*err) += "Failed to parse `bufferView` for image[" + + std::to_string(image_idx) + "] name = \"" + image->name + + "\"\n"; + } + return false; + } + + std::string mime_type; + ParseStringProperty(&mime_type, err, o, "mimeType", false); + + int width = 0; + ParseIntegerProperty(&width, err, o, "width", false); + + int height = 0; + ParseIntegerProperty(&height, err, o, "height", false); + + // Just only save some information here. Loading actual image data from + // bufferView is done after this `ParseImage` function. + image->bufferView = bufferView; + image->mimeType = mime_type; + image->width = width; + image->height = height; + + return true; + } + + // Parse URI & Load image data. + + std::string uri; + std::string tmp_err; + if (!ParseStringProperty(&uri, &tmp_err, o, "uri", true)) { + if (err) { + (*err) += "Failed to parse `uri` for image[" + std::to_string(image_idx) + + "] name = \"" + image->name + "\".\n"; + } + return false; + } + + std::vector img; + + if (IsDataURI(uri)) { + if (!DecodeDataURI(&img, image->mimeType, uri, 0, false)) { + if (err) { + (*err) += "Failed to decode 'uri' for image[" + + std::to_string(image_idx) + "] name = [" + image->name + + "]\n"; + } + return false; + } + } else { + // Assume external file + // Keep texture path (for textures that cannot be decoded) + image->uri = uri; +#ifdef TINYGLTF_NO_EXTERNAL_IMAGE + return true; +#endif + std::string decoded_uri = dlib::urldecode(uri); + if (!LoadExternalFile(&img, err, warn, decoded_uri, basedir, + /* required */ false, /* required bytes */ 0, + /* checksize */ false, fs)) { + if (warn) { + (*warn) += "Failed to load external 'uri' for image[" + + std::to_string(image_idx) + "] name = [" + image->name + + "]\n"; + } + // If the image cannot be loaded, keep uri as image->uri. + return true; + } + + if (img.empty()) { + if (warn) { + (*warn) += "Image data is empty for image[" + + std::to_string(image_idx) + "] name = [" + image->name + + "] \n"; + } + return false; + } + } + + if (*LoadImageData == nullptr) { + if (err) { + (*err) += "No LoadImageData callback specified.\n"; + } + return false; + } + return (*LoadImageData)(image, image_idx, err, warn, 0, 0, &img.at(0), + static_cast(img.size()), load_image_user_data); +} + +static bool ParseTexture(Texture *texture, std::string *err, const json &o, + bool store_original_json_for_extras_and_extensions, + const std::string &basedir) { + (void)basedir; + int sampler = -1; + int source = -1; + ParseIntegerProperty(&sampler, err, o, "sampler", false); + + ParseIntegerProperty(&source, err, o, "source", false); + + texture->sampler = sampler; + texture->source = source; + + ParseExtensionsProperty(&texture->extensions, err, o); + ParseExtrasProperty(&texture->extras, o); + + if (store_original_json_for_extras_and_extensions) { + { + json_const_iterator it; + if (FindMember(o, "extensions", it)) { + texture->extensions_json_string = JsonToString(GetValue(it)); + } + } + { + json_const_iterator it; + if (FindMember(o, "extras", it)) { + texture->extras_json_string = JsonToString(GetValue(it)); + } + } + } + + ParseStringProperty(&texture->name, err, o, "name", false); + + return true; +} + +static bool ParseTextureInfo( + TextureInfo *texinfo, std::string *err, const json &o, + bool store_original_json_for_extras_and_extensions) { + if (texinfo == nullptr) { + return false; + } + + if (!ParseIntegerProperty(&texinfo->index, err, o, "index", + /* required */ true, "TextureInfo")) { + return false; + } + + ParseIntegerProperty(&texinfo->texCoord, err, o, "texCoord", false); + + ParseExtensionsProperty(&texinfo->extensions, err, o); + ParseExtrasProperty(&texinfo->extras, o); + + if (store_original_json_for_extras_and_extensions) { + { + json_const_iterator it; + if (FindMember(o, "extensions", it)) { + texinfo->extensions_json_string = JsonToString(GetValue(it)); + } + } + { + json_const_iterator it; + if (FindMember(o, "extras", it)) { + texinfo->extras_json_string = JsonToString(GetValue(it)); + } + } + } + + return true; +} + +static bool ParseNormalTextureInfo( + NormalTextureInfo *texinfo, std::string *err, const json &o, + bool store_original_json_for_extras_and_extensions) { + if (texinfo == nullptr) { + return false; + } + + if (!ParseIntegerProperty(&texinfo->index, err, o, "index", + /* required */ true, "NormalTextureInfo")) { + return false; + } + + ParseIntegerProperty(&texinfo->texCoord, err, o, "texCoord", false); + ParseNumberProperty(&texinfo->scale, err, o, "scale", false); + + ParseExtensionsProperty(&texinfo->extensions, err, o); + ParseExtrasProperty(&texinfo->extras, o); + + if (store_original_json_for_extras_and_extensions) { + { + json_const_iterator it; + if (FindMember(o, "extensions", it)) { + texinfo->extensions_json_string = JsonToString(GetValue(it)); + } + } + { + json_const_iterator it; + if (FindMember(o, "extras", it)) { + texinfo->extras_json_string = JsonToString(GetValue(it)); + } + } + } + + return true; +} + +static bool ParseOcclusionTextureInfo( + OcclusionTextureInfo *texinfo, std::string *err, const json &o, + bool store_original_json_for_extras_and_extensions) { + if (texinfo == nullptr) { + return false; + } + + if (!ParseIntegerProperty(&texinfo->index, err, o, "index", + /* required */ true, "NormalTextureInfo")) { + return false; + } + + ParseIntegerProperty(&texinfo->texCoord, err, o, "texCoord", false); + ParseNumberProperty(&texinfo->strength, err, o, "strength", false); + + ParseExtensionsProperty(&texinfo->extensions, err, o); + ParseExtrasProperty(&texinfo->extras, o); + + if (store_original_json_for_extras_and_extensions) { + { + json_const_iterator it; + if (FindMember(o, "extensions", it)) { + texinfo->extensions_json_string = JsonToString(GetValue(it)); + } + } + { + json_const_iterator it; + if (FindMember(o, "extras", it)) { + texinfo->extras_json_string = JsonToString(GetValue(it)); + } + } + } + + return true; +} + +static bool ParseBuffer(Buffer *buffer, std::string *err, const json &o, + bool store_original_json_for_extras_and_extensions, + FsCallbacks *fs, const std::string &basedir, + bool is_binary = false, + const unsigned char *bin_data = nullptr, + size_t bin_size = 0) { + size_t byteLength; + if (!ParseUnsignedProperty(&byteLength, err, o, "byteLength", true, + "Buffer")) { + return false; + } + + // In glTF 2.0, uri is not mandatory anymore + buffer->uri.clear(); + ParseStringProperty(&buffer->uri, err, o, "uri", false, "Buffer"); + + // having an empty uri for a non embedded image should not be valid + if (!is_binary && buffer->uri.empty()) { + if (err) { + (*err) += "'uri' is missing from non binary glTF file buffer.\n"; + } + } + + json_const_iterator type; + if (FindMember(o, "type", type)) { + std::string typeStr; + if (GetString(GetValue(type), typeStr)) { + if (typeStr.compare("arraybuffer") == 0) { + // buffer.type = "arraybuffer"; + } + } + } + + if (is_binary) { + // Still binary glTF accepts external dataURI. + if (!buffer->uri.empty()) { + // First try embedded data URI. + if (IsDataURI(buffer->uri)) { + std::string mime_type; + if (!DecodeDataURI(&buffer->data, mime_type, buffer->uri, byteLength, + true)) { + if (err) { + (*err) += + "Failed to decode 'uri' : " + buffer->uri + " in Buffer\n"; + } + return false; + } + } else { + // External .bin file. + std::string decoded_uri = dlib::urldecode(buffer->uri); + if (!LoadExternalFile(&buffer->data, err, /* warn */ nullptr, + decoded_uri, basedir, /* required */ true, + byteLength, /* checkSize */ true, fs)) { + return false; + } + } + } else { + // load data from (embedded) binary data + + if ((bin_size == 0) || (bin_data == nullptr)) { + if (err) { + (*err) += "Invalid binary data in `Buffer'.\n"; + } + return false; + } + + if (byteLength > bin_size) { + if (err) { + std::stringstream ss; + ss << "Invalid `byteLength'. Must be equal or less than binary size: " + "`byteLength' = " + << byteLength << ", binary size = " << bin_size << std::endl; + (*err) += ss.str(); + } + return false; + } + + // Read buffer data + buffer->data.resize(static_cast(byteLength)); + memcpy(&(buffer->data.at(0)), bin_data, static_cast(byteLength)); + } + + } else { + if (IsDataURI(buffer->uri)) { + std::string mime_type; + if (!DecodeDataURI(&buffer->data, mime_type, buffer->uri, byteLength, + true)) { + if (err) { + (*err) += "Failed to decode 'uri' : " + buffer->uri + " in Buffer\n"; + } + return false; + } + } else { + // Assume external .bin file. + std::string decoded_uri = dlib::urldecode(buffer->uri); + if (!LoadExternalFile(&buffer->data, err, /* warn */ nullptr, decoded_uri, + basedir, /* required */ true, byteLength, + /* checkSize */ true, fs)) { + return false; + } + } + } + + ParseStringProperty(&buffer->name, err, o, "name", false); + + ParseExtensionsProperty(&buffer->extensions, err, o); + ParseExtrasProperty(&buffer->extras, o); + + if (store_original_json_for_extras_and_extensions) { + { + json_const_iterator it; + if (FindMember(o, "extensions", it)) { + buffer->extensions_json_string = JsonToString(GetValue(it)); + } + } + { + json_const_iterator it; + if (FindMember(o, "extras", it)) { + buffer->extras_json_string = JsonToString(GetValue(it)); + } + } + } + + return true; +} + +static bool ParseBufferView( + BufferView *bufferView, std::string *err, const json &o, + bool store_original_json_for_extras_and_extensions) { + int buffer = -1; + if (!ParseIntegerProperty(&buffer, err, o, "buffer", true, "BufferView")) { + return false; + } + + size_t byteOffset = 0; + ParseUnsignedProperty(&byteOffset, err, o, "byteOffset", false); + + size_t byteLength = 1; + if (!ParseUnsignedProperty(&byteLength, err, o, "byteLength", true, + "BufferView")) { + return false; + } + + size_t byteStride = 0; + if (!ParseUnsignedProperty(&byteStride, err, o, "byteStride", false)) { + // Spec says: When byteStride of referenced bufferView is not defined, it + // means that accessor elements are tightly packed, i.e., effective stride + // equals the size of the element. + // We cannot determine the actual byteStride until Accessor are parsed, thus + // set 0(= tightly packed) here(as done in OpenGL's VertexAttribPoiner) + byteStride = 0; + } + + if ((byteStride > 252) || ((byteStride % 4) != 0)) { + if (err) { + std::stringstream ss; + ss << "Invalid `byteStride' value. `byteStride' must be the multiple of " + "4 : " + << byteStride << std::endl; + + (*err) += ss.str(); + } + return false; + } + + int target = 0; + ParseIntegerProperty(&target, err, o, "target", false); + if ((target == TINYGLTF_TARGET_ARRAY_BUFFER) || + (target == TINYGLTF_TARGET_ELEMENT_ARRAY_BUFFER)) { + // OK + } else { + target = 0; + } + bufferView->target = target; + + ParseStringProperty(&bufferView->name, err, o, "name", false); + + ParseExtensionsProperty(&bufferView->extensions, err, o); + ParseExtrasProperty(&bufferView->extras, o); + + if (store_original_json_for_extras_and_extensions) { + { + json_const_iterator it; + if (FindMember(o, "extensions", it)) { + bufferView->extensions_json_string = JsonToString(GetValue(it)); + } + } + { + json_const_iterator it; + if (FindMember(o, "extras", it)) { + bufferView->extras_json_string = JsonToString(GetValue(it)); + } + } + } + + bufferView->buffer = buffer; + bufferView->byteOffset = byteOffset; + bufferView->byteLength = byteLength; + bufferView->byteStride = byteStride; + return true; +} + +static bool ParseSparseAccessor(Accessor *accessor, std::string *err, + const json &o) { + accessor->sparse.isSparse = true; + + int count = 0; + if (!ParseIntegerProperty(&count, err, o, "count", true, "SparseAccessor")) { + return false; + } + + json_const_iterator indices_iterator; + json_const_iterator values_iterator; + if (!FindMember(o, "indices", indices_iterator)) { + (*err) = "the sparse object of this accessor doesn't have indices"; + return false; + } + + if (!FindMember(o, "values", values_iterator)) { + (*err) = "the sparse object ob ths accessor doesn't have values"; + return false; + } + + const json &indices_obj = GetValue(indices_iterator); + const json &values_obj = GetValue(values_iterator); + + int indices_buffer_view = 0, indices_byte_offset = 0, component_type = 0; + if (!ParseIntegerProperty(&indices_buffer_view, err, indices_obj, "bufferView", + true, "SparseAccessor")) { + return false; + } + ParseIntegerProperty(&indices_byte_offset, err, indices_obj, "byteOffset", + false); + if (!ParseIntegerProperty(&component_type, err, indices_obj, "componentType", + true, "SparseAccessor")) { + return false; + } + + int values_buffer_view = 0, values_byte_offset = 0; + if (!ParseIntegerProperty(&values_buffer_view, err, values_obj, "bufferView", + true, "SparseAccessor")) { + return false; + } + ParseIntegerProperty(&values_byte_offset, err, values_obj, "byteOffset", + false); + + accessor->sparse.count = count; + accessor->sparse.indices.bufferView = indices_buffer_view; + accessor->sparse.indices.byteOffset = indices_byte_offset; + accessor->sparse.indices.componentType = component_type; + accessor->sparse.values.bufferView = values_buffer_view; + accessor->sparse.values.byteOffset = values_byte_offset; + + return true; +} + +static bool ParseAccessor(Accessor *accessor, std::string *err, const json &o, + bool store_original_json_for_extras_and_extensions) { + int bufferView = -1; + ParseIntegerProperty(&bufferView, err, o, "bufferView", false, "Accessor"); + + size_t byteOffset = 0; + ParseUnsignedProperty(&byteOffset, err, o, "byteOffset", false, "Accessor"); + + bool normalized = false; + ParseBooleanProperty(&normalized, err, o, "normalized", false, "Accessor"); + + size_t componentType = 0; + if (!ParseUnsignedProperty(&componentType, err, o, "componentType", true, + "Accessor")) { + return false; + } + + size_t count = 0; + if (!ParseUnsignedProperty(&count, err, o, "count", true, "Accessor")) { + return false; + } + + std::string type; + if (!ParseStringProperty(&type, err, o, "type", true, "Accessor")) { + return false; + } + + if (type.compare("SCALAR") == 0) { + accessor->type = TINYGLTF_TYPE_SCALAR; + } else if (type.compare("VEC2") == 0) { + accessor->type = TINYGLTF_TYPE_VEC2; + } else if (type.compare("VEC3") == 0) { + accessor->type = TINYGLTF_TYPE_VEC3; + } else if (type.compare("VEC4") == 0) { + accessor->type = TINYGLTF_TYPE_VEC4; + } else if (type.compare("MAT2") == 0) { + accessor->type = TINYGLTF_TYPE_MAT2; + } else if (type.compare("MAT3") == 0) { + accessor->type = TINYGLTF_TYPE_MAT3; + } else if (type.compare("MAT4") == 0) { + accessor->type = TINYGLTF_TYPE_MAT4; + } else { + std::stringstream ss; + ss << "Unsupported `type` for accessor object. Got \"" << type << "\"\n"; + if (err) { + (*err) += ss.str(); + } + return false; + } + + ParseStringProperty(&accessor->name, err, o, "name", false); + + accessor->minValues.clear(); + accessor->maxValues.clear(); + ParseNumberArrayProperty(&accessor->minValues, err, o, "min", false, + "Accessor"); + + ParseNumberArrayProperty(&accessor->maxValues, err, o, "max", false, + "Accessor"); + + accessor->count = count; + accessor->bufferView = bufferView; + accessor->byteOffset = byteOffset; + accessor->normalized = normalized; + { + if (componentType >= TINYGLTF_COMPONENT_TYPE_BYTE && + componentType <= TINYGLTF_COMPONENT_TYPE_DOUBLE) { + // OK + accessor->componentType = int(componentType); + } else { + std::stringstream ss; + ss << "Invalid `componentType` in accessor. Got " << componentType + << "\n"; + if (err) { + (*err) += ss.str(); + } + return false; + } + } + + ParseExtensionsProperty(&(accessor->extensions), err, o); + ParseExtrasProperty(&(accessor->extras), o); + + if (store_original_json_for_extras_and_extensions) { + { + json_const_iterator it; + if (FindMember(o, "extensions", it)) { + accessor->extensions_json_string = JsonToString(GetValue(it)); + } + } + { + json_const_iterator it; + if (FindMember(o, "extras", it)) { + accessor->extras_json_string = JsonToString(GetValue(it)); + } + } + } + + // check if accessor has a "sparse" object: + json_const_iterator iterator; + if (FindMember(o, "sparse", iterator)) { + // here this accessor has a "sparse" subobject + return ParseSparseAccessor(accessor, err, GetValue(iterator)); + } + + return true; +} + +#ifdef TINYGLTF_ENABLE_DRACO + +static void DecodeIndexBuffer(draco::Mesh *mesh, size_t componentSize, + std::vector &outBuffer) { + if (componentSize == 4) { + assert(sizeof(mesh->face(draco::FaceIndex(0))[0]) == componentSize); + memcpy(outBuffer.data(), &mesh->face(draco::FaceIndex(0))[0], + outBuffer.size()); + } else { + size_t faceStride = componentSize * 3; + for (draco::FaceIndex f(0); f < mesh->num_faces(); ++f) { + const draco::Mesh::Face &face = mesh->face(f); + if (componentSize == 2) { + uint16_t indices[3] = {(uint16_t)face[0].value(), + (uint16_t)face[1].value(), + (uint16_t)face[2].value()}; + memcpy(outBuffer.data() + f.value() * faceStride, &indices[0], + faceStride); + } else { + uint8_t indices[3] = {(uint8_t)face[0].value(), + (uint8_t)face[1].value(), + (uint8_t)face[2].value()}; + memcpy(outBuffer.data() + f.value() * faceStride, &indices[0], + faceStride); + } + } + } +} + +template +static bool GetAttributeForAllPoints(draco::Mesh *mesh, + const draco::PointAttribute *pAttribute, + std::vector &outBuffer) { + size_t byteOffset = 0; + T values[4] = {0, 0, 0, 0}; + for (draco::PointIndex i(0); i < mesh->num_points(); ++i) { + const draco::AttributeValueIndex val_index = pAttribute->mapped_index(i); + if (!pAttribute->ConvertValue(val_index, pAttribute->num_components(), + values)) + return false; + + memcpy(outBuffer.data() + byteOffset, &values[0], + sizeof(T) * pAttribute->num_components()); + byteOffset += sizeof(T) * pAttribute->num_components(); + } + + return true; +} + +static bool GetAttributeForAllPoints(uint32_t componentType, draco::Mesh *mesh, + const draco::PointAttribute *pAttribute, + std::vector &outBuffer) { + bool decodeResult = false; + switch (componentType) { + case TINYGLTF_COMPONENT_TYPE_UNSIGNED_BYTE: + decodeResult = + GetAttributeForAllPoints(mesh, pAttribute, outBuffer); + break; + case TINYGLTF_COMPONENT_TYPE_BYTE: + decodeResult = + GetAttributeForAllPoints(mesh, pAttribute, outBuffer); + break; + case TINYGLTF_COMPONENT_TYPE_UNSIGNED_SHORT: + decodeResult = + GetAttributeForAllPoints(mesh, pAttribute, outBuffer); + break; + case TINYGLTF_COMPONENT_TYPE_SHORT: + decodeResult = + GetAttributeForAllPoints(mesh, pAttribute, outBuffer); + break; + case TINYGLTF_COMPONENT_TYPE_INT: + decodeResult = + GetAttributeForAllPoints(mesh, pAttribute, outBuffer); + break; + case TINYGLTF_COMPONENT_TYPE_UNSIGNED_INT: + decodeResult = + GetAttributeForAllPoints(mesh, pAttribute, outBuffer); + break; + case TINYGLTF_COMPONENT_TYPE_FLOAT: + decodeResult = + GetAttributeForAllPoints(mesh, pAttribute, outBuffer); + break; + case TINYGLTF_COMPONENT_TYPE_DOUBLE: + decodeResult = + GetAttributeForAllPoints(mesh, pAttribute, outBuffer); + break; + default: + return false; + } + + return decodeResult; +} + +static bool ParseDracoExtension(Primitive *primitive, Model *model, + std::string *err, + const Value &dracoExtensionValue) { + (void)err; + auto bufferViewValue = dracoExtensionValue.Get("bufferView"); + if (!bufferViewValue.IsInt()) return false; + auto attributesValue = dracoExtensionValue.Get("attributes"); + if (!attributesValue.IsObject()) return false; + + auto attributesObject = attributesValue.Get(); + int bufferView = bufferViewValue.Get(); + + BufferView &view = model->bufferViews[bufferView]; + Buffer &buffer = model->buffers[view.buffer]; + // BufferView has already been decoded + if (view.dracoDecoded) return true; + view.dracoDecoded = true; + + const char *bufferViewData = + reinterpret_cast(buffer.data.data() + view.byteOffset); + size_t bufferViewSize = view.byteLength; + + // decode draco + draco::DecoderBuffer decoderBuffer; + decoderBuffer.Init(bufferViewData, bufferViewSize); + draco::Decoder decoder; + auto decodeResult = decoder.DecodeMeshFromBuffer(&decoderBuffer); + if (!decodeResult.ok()) { + return false; + } + const std::unique_ptr &mesh = decodeResult.value(); + + // create new bufferView for indices + if (primitive->indices >= 0) { + int32_t componentSize = GetComponentSizeInBytes( + model->accessors[primitive->indices].componentType); + Buffer decodedIndexBuffer; + decodedIndexBuffer.data.resize(mesh->num_faces() * 3 * componentSize); + + DecodeIndexBuffer(mesh.get(), componentSize, decodedIndexBuffer.data); + + model->buffers.emplace_back(std::move(decodedIndexBuffer)); + + BufferView decodedIndexBufferView; + decodedIndexBufferView.buffer = int(model->buffers.size() - 1); + decodedIndexBufferView.byteLength = + int(mesh->num_faces() * 3 * componentSize); + decodedIndexBufferView.byteOffset = 0; + decodedIndexBufferView.byteStride = 0; + decodedIndexBufferView.target = TINYGLTF_TARGET_ARRAY_BUFFER; + model->bufferViews.emplace_back(std::move(decodedIndexBufferView)); + + model->accessors[primitive->indices].bufferView = + int(model->bufferViews.size() - 1); + model->accessors[primitive->indices].count = int(mesh->num_faces() * 3); + } + + for (const auto &attribute : attributesObject) { + if (!attribute.second.IsInt()) return false; + auto primitiveAttribute = primitive->attributes.find(attribute.first); + if (primitiveAttribute == primitive->attributes.end()) return false; + + int dracoAttributeIndex = attribute.second.Get(); + const auto pAttribute = mesh->GetAttributeByUniqueId(dracoAttributeIndex); + const auto componentType = + model->accessors[primitiveAttribute->second].componentType; + + // Create a new buffer for this decoded buffer + Buffer decodedBuffer; + size_t bufferSize = mesh->num_points() * pAttribute->num_components() * + GetComponentSizeInBytes(componentType); + decodedBuffer.data.resize(bufferSize); + + if (!GetAttributeForAllPoints(componentType, mesh.get(), pAttribute, + decodedBuffer.data)) + return false; + + model->buffers.emplace_back(std::move(decodedBuffer)); + + BufferView decodedBufferView; + decodedBufferView.buffer = int(model->buffers.size() - 1); + decodedBufferView.byteLength = bufferSize; + decodedBufferView.byteOffset = pAttribute->byte_offset(); + decodedBufferView.byteStride = pAttribute->byte_stride(); + decodedBufferView.target = primitive->indices >= 0 + ? TINYGLTF_TARGET_ELEMENT_ARRAY_BUFFER + : TINYGLTF_TARGET_ARRAY_BUFFER; + model->bufferViews.emplace_back(std::move(decodedBufferView)); + + model->accessors[primitiveAttribute->second].bufferView = + int(model->bufferViews.size() - 1); + model->accessors[primitiveAttribute->second].count = + int(mesh->num_points()); + } + + return true; +} +#endif + +static bool ParsePrimitive(Primitive *primitive, Model *model, std::string *err, + const json &o, + bool store_original_json_for_extras_and_extensions) { + int material = -1; + ParseIntegerProperty(&material, err, o, "material", false); + primitive->material = material; + + int mode = TINYGLTF_MODE_TRIANGLES; + ParseIntegerProperty(&mode, err, o, "mode", false); + primitive->mode = mode; // Why only triangled were supported ? + + int indices = -1; + ParseIntegerProperty(&indices, err, o, "indices", false); + primitive->indices = indices; + if (!ParseStringIntegerProperty(&primitive->attributes, err, o, "attributes", + true, "Primitive")) { + return false; + } + + // Look for morph targets + json_const_iterator targetsObject; + if (FindMember(o, "targets", targetsObject) && + IsArray(GetValue(targetsObject))) { + auto targetsObjectEnd = ArrayEnd(GetValue(targetsObject)); + for (json_const_array_iterator i = ArrayBegin(GetValue(targetsObject)); + i != targetsObjectEnd; ++i) { + std::map targetAttribues; + + const json &dict = *i; + if (IsObject(dict)) { + json_const_iterator dictIt(ObjectBegin(dict)); + json_const_iterator dictItEnd(ObjectEnd(dict)); + + for (; dictIt != dictItEnd; ++dictIt) { + int iVal; + if (GetInt(GetValue(dictIt), iVal)) + targetAttribues[GetKey(dictIt)] = iVal; + } + primitive->targets.emplace_back(std::move(targetAttribues)); + } + } + } + + ParseExtrasProperty(&(primitive->extras), o); + ParseExtensionsProperty(&primitive->extensions, err, o); + + if (store_original_json_for_extras_and_extensions) { + { + json_const_iterator it; + if (FindMember(o, "extensions", it)) { + primitive->extensions_json_string = JsonToString(GetValue(it)); + } + } + { + json_const_iterator it; + if (FindMember(o, "extras", it)) { + primitive->extras_json_string = JsonToString(GetValue(it)); + } + } + } + +#ifdef TINYGLTF_ENABLE_DRACO + auto dracoExtension = + primitive->extensions.find("KHR_draco_mesh_compression"); + if (dracoExtension != primitive->extensions.end()) { + ParseDracoExtension(primitive, model, err, dracoExtension->second); + } +#else + (void)model; +#endif + + return true; +} + +static bool ParseMesh(Mesh *mesh, Model *model, std::string *err, const json &o, + bool store_original_json_for_extras_and_extensions) { + ParseStringProperty(&mesh->name, err, o, "name", false); + + mesh->primitives.clear(); + json_const_iterator primObject; + if (FindMember(o, "primitives", primObject) && + IsArray(GetValue(primObject))) { + json_const_array_iterator primEnd = ArrayEnd(GetValue(primObject)); + for (json_const_array_iterator i = ArrayBegin(GetValue(primObject)); + i != primEnd; ++i) { + Primitive primitive; + if (ParsePrimitive(&primitive, model, err, *i, + store_original_json_for_extras_and_extensions)) { + // Only add the primitive if the parsing succeeds. + mesh->primitives.emplace_back(std::move(primitive)); + } + } + } + + // Should probably check if has targets and if dimensions fit + ParseNumberArrayProperty(&mesh->weights, err, o, "weights", false); + + ParseExtensionsProperty(&mesh->extensions, err, o); + ParseExtrasProperty(&(mesh->extras), o); + + if (store_original_json_for_extras_and_extensions) { + { + json_const_iterator it; + if (FindMember(o, "extensions", it)) { + mesh->extensions_json_string = JsonToString(GetValue(it)); + } + } + { + json_const_iterator it; + if (FindMember(o, "extras", it)) { + mesh->extras_json_string = JsonToString(GetValue(it)); + } + } + } + + return true; +} + +static bool ParseNode(Node *node, std::string *err, const json &o, + bool store_original_json_for_extras_and_extensions) { + ParseStringProperty(&node->name, err, o, "name", false); + + int skin = -1; + ParseIntegerProperty(&skin, err, o, "skin", false); + node->skin = skin; + + // Matrix and T/R/S are exclusive + if (!ParseNumberArrayProperty(&node->matrix, err, o, "matrix", false)) { + ParseNumberArrayProperty(&node->rotation, err, o, "rotation", false); + ParseNumberArrayProperty(&node->scale, err, o, "scale", false); + ParseNumberArrayProperty(&node->translation, err, o, "translation", false); + } + + int camera = -1; + ParseIntegerProperty(&camera, err, o, "camera", false); + node->camera = camera; + + int mesh = -1; + ParseIntegerProperty(&mesh, err, o, "mesh", false); + node->mesh = mesh; + + node->children.clear(); + ParseIntegerArrayProperty(&node->children, err, o, "children", false); + + ParseNumberArrayProperty(&node->weights, err, o, "weights", false); + + ParseExtensionsProperty(&node->extensions, err, o); + ParseExtrasProperty(&(node->extras), o); + + if (store_original_json_for_extras_and_extensions) { + { + json_const_iterator it; + if (FindMember(o, "extensions", it)) { + node->extensions_json_string = JsonToString(GetValue(it)); + } + } + { + json_const_iterator it; + if (FindMember(o, "extras", it)) { + node->extras_json_string = JsonToString(GetValue(it)); + } + } + } + + return true; +} + +static bool ParsePbrMetallicRoughness( + PbrMetallicRoughness *pbr, std::string *err, const json &o, + bool store_original_json_for_extras_and_extensions) { + if (pbr == nullptr) { + return false; + } + + std::vector baseColorFactor; + if (ParseNumberArrayProperty(&baseColorFactor, err, o, "baseColorFactor", + /* required */ false)) { + if (baseColorFactor.size() != 4) { + if (err) { + (*err) += + "Array length of `baseColorFactor` parameter in " + "pbrMetallicRoughness must be 4, but got " + + std::to_string(baseColorFactor.size()) + "\n"; + } + return false; + } + pbr->baseColorFactor = baseColorFactor; + } + + { + json_const_iterator it; + if (FindMember(o, "baseColorTexture", it)) { + ParseTextureInfo(&pbr->baseColorTexture, err, GetValue(it), + store_original_json_for_extras_and_extensions); + } + } + + { + json_const_iterator it; + if (FindMember(o, "metallicRoughnessTexture", it)) { + ParseTextureInfo(&pbr->metallicRoughnessTexture, err, GetValue(it), + store_original_json_for_extras_and_extensions); + } + } + + ParseNumberProperty(&pbr->metallicFactor, err, o, "metallicFactor", false); + ParseNumberProperty(&pbr->roughnessFactor, err, o, "roughnessFactor", false); + + ParseExtensionsProperty(&pbr->extensions, err, o); + ParseExtrasProperty(&pbr->extras, o); + + if (store_original_json_for_extras_and_extensions) { + { + json_const_iterator it; + if (FindMember(o, "extensions", it)) { + pbr->extensions_json_string = JsonToString(GetValue(it)); + } + } + { + json_const_iterator it; + if (FindMember(o, "extras", it)) { + pbr->extras_json_string = JsonToString(GetValue(it)); + } + } + } + + return true; +} + +static bool ParseMaterial(Material *material, std::string *err, const json &o, + bool store_original_json_for_extras_and_extensions) { + ParseStringProperty(&material->name, err, o, "name", /* required */ false); + + if (ParseNumberArrayProperty(&material->emissiveFactor, err, o, + "emissiveFactor", + /* required */ false)) { + if (material->emissiveFactor.size() != 3) { + if (err) { + (*err) += + "Array length of `emissiveFactor` parameter in " + "material must be 3, but got " + + std::to_string(material->emissiveFactor.size()) + "\n"; + } + return false; + } + } else { + // fill with default values + material->emissiveFactor = {0.0, 0.0, 0.0}; + } + + ParseStringProperty(&material->alphaMode, err, o, "alphaMode", + /* required */ false); + ParseNumberProperty(&material->alphaCutoff, err, o, "alphaCutoff", + /* required */ false); + ParseBooleanProperty(&material->doubleSided, err, o, "doubleSided", + /* required */ false); + + { + json_const_iterator it; + if (FindMember(o, "pbrMetallicRoughness", it)) { + ParsePbrMetallicRoughness(&material->pbrMetallicRoughness, err, + GetValue(it), + store_original_json_for_extras_and_extensions); + } + } + + { + json_const_iterator it; + if (FindMember(o, "normalTexture", it)) { + ParseNormalTextureInfo(&material->normalTexture, err, GetValue(it), + store_original_json_for_extras_and_extensions); + } + } + + { + json_const_iterator it; + if (FindMember(o, "occlusionTexture", it)) { + ParseOcclusionTextureInfo(&material->occlusionTexture, err, GetValue(it), + store_original_json_for_extras_and_extensions); + } + } + + { + json_const_iterator it; + if (FindMember(o, "emissiveTexture", it)) { + ParseTextureInfo(&material->emissiveTexture, err, GetValue(it), + store_original_json_for_extras_and_extensions); + } + } + + // Old code path. For backward compatibility, we still store material values + // as Parameter. This will create duplicated information for + // example(pbrMetallicRoughness), but should be neglible in terms of memory + // consumption. + // TODO(syoyo): Remove in the next major release. + material->values.clear(); + material->additionalValues.clear(); + + json_const_iterator it(ObjectBegin(o)); + json_const_iterator itEnd(ObjectEnd(o)); + + for (; it != itEnd; ++it) { + std::string key(GetKey(it)); + if (key == "pbrMetallicRoughness") { + if (IsObject(GetValue(it))) { + const json &values_object = GetValue(it); + + json_const_iterator itVal(ObjectBegin(values_object)); + json_const_iterator itValEnd(ObjectEnd(values_object)); + + for (; itVal != itValEnd; ++itVal) { + Parameter param; + if (ParseParameterProperty(¶m, err, values_object, GetKey(itVal), + false)) { + material->values.emplace(GetKey(itVal), std::move(param)); + } + } + } + } else if (key == "extensions" || key == "extras") { + // done later, skip, otherwise poorly parsed contents will be saved in the + // parametermap and serialized again later + } else { + Parameter param; + if (ParseParameterProperty(¶m, err, o, key, false)) { + // names of materials have already been parsed. Putting it in this map + // doesn't correctly reflext the glTF specification + if (key != "name") + material->additionalValues.emplace(std::move(key), std::move(param)); + } + } + } + + material->extensions.clear(); + ParseExtensionsProperty(&material->extensions, err, o); + ParseExtrasProperty(&(material->extras), o); + + if (store_original_json_for_extras_and_extensions) { + { + json_const_iterator eit; + if (FindMember(o, "extensions", eit)) { + material->extensions_json_string = JsonToString(GetValue(eit)); + } + } + { + json_const_iterator eit; + if (FindMember(o, "extras", eit)) { + material->extras_json_string = JsonToString(GetValue(eit)); + } + } + } + + return true; +} + +static bool ParseAnimationChannel( + AnimationChannel *channel, std::string *err, const json &o, + bool store_original_json_for_extras_and_extensions) { + int samplerIndex = -1; + int targetIndex = -1; + if (!ParseIntegerProperty(&samplerIndex, err, o, "sampler", true, + "AnimationChannel")) { + if (err) { + (*err) += "`sampler` field is missing in animation channels\n"; + } + return false; + } + + json_const_iterator targetIt; + if (FindMember(o, "target", targetIt) && IsObject(GetValue(targetIt))) { + const json &target_object = GetValue(targetIt); + + if (!ParseIntegerProperty(&targetIndex, err, target_object, "node", true)) { + if (err) { + (*err) += "`node` field is missing in animation.channels.target\n"; + } + return false; + } + + if (!ParseStringProperty(&channel->target_path, err, target_object, "path", + true)) { + if (err) { + (*err) += "`path` field is missing in animation.channels.target\n"; + } + return false; + } + ParseExtensionsProperty(&channel->target_extensions, err, target_object); + if (store_original_json_for_extras_and_extensions) { + json_const_iterator it; + if (FindMember(target_object, "extensions", it)) { + channel->target_extensions_json_string = JsonToString(GetValue(it)); + } + } + } + + channel->sampler = samplerIndex; + channel->target_node = targetIndex; + + ParseExtensionsProperty(&channel->extensions, err, o); + ParseExtrasProperty(&(channel->extras), o); + + if (store_original_json_for_extras_and_extensions) { + { + json_const_iterator it; + if (FindMember(o, "extensions", it)) { + channel->extensions_json_string = JsonToString(GetValue(it)); + } + } + { + json_const_iterator it; + if (FindMember(o, "extras", it)) { + channel->extras_json_string = JsonToString(GetValue(it)); + } + } + } + + return true; +} + +static bool ParseAnimation(Animation *animation, std::string *err, + const json &o, + bool store_original_json_for_extras_and_extensions) { + { + json_const_iterator channelsIt; + if (FindMember(o, "channels", channelsIt) && + IsArray(GetValue(channelsIt))) { + json_const_array_iterator channelEnd = ArrayEnd(GetValue(channelsIt)); + for (json_const_array_iterator i = ArrayBegin(GetValue(channelsIt)); + i != channelEnd; ++i) { + AnimationChannel channel; + if (ParseAnimationChannel( + &channel, err, *i, + store_original_json_for_extras_and_extensions)) { + // Only add the channel if the parsing succeeds. + animation->channels.emplace_back(std::move(channel)); + } + } + } + } + + { + json_const_iterator samplerIt; + if (FindMember(o, "samplers", samplerIt) && IsArray(GetValue(samplerIt))) { + const json &sampler_array = GetValue(samplerIt); + + json_const_array_iterator it = ArrayBegin(sampler_array); + json_const_array_iterator itEnd = ArrayEnd(sampler_array); + + for (; it != itEnd; ++it) { + const json &s = *it; + + AnimationSampler sampler; + int inputIndex = -1; + int outputIndex = -1; + if (!ParseIntegerProperty(&inputIndex, err, s, "input", true)) { + if (err) { + (*err) += "`input` field is missing in animation.sampler\n"; + } + return false; + } + ParseStringProperty(&sampler.interpolation, err, s, "interpolation", + false); + if (!ParseIntegerProperty(&outputIndex, err, s, "output", true)) { + if (err) { + (*err) += "`output` field is missing in animation.sampler\n"; + } + return false; + } + sampler.input = inputIndex; + sampler.output = outputIndex; + ParseExtensionsProperty(&(sampler.extensions), err, o); + ParseExtrasProperty(&(sampler.extras), s); + + if (store_original_json_for_extras_and_extensions) { + { + json_const_iterator eit; + if (FindMember(o, "extensions", eit)) { + sampler.extensions_json_string = JsonToString(GetValue(eit)); + } + } + { + json_const_iterator eit; + if (FindMember(o, "extras", eit)) { + sampler.extras_json_string = JsonToString(GetValue(eit)); + } + } + } + + animation->samplers.emplace_back(std::move(sampler)); + } + } + } + + ParseStringProperty(&animation->name, err, o, "name", false); + + ParseExtensionsProperty(&animation->extensions, err, o); + ParseExtrasProperty(&(animation->extras), o); + + if (store_original_json_for_extras_and_extensions) { + { + json_const_iterator it; + if (FindMember(o, "extensions", it)) { + animation->extensions_json_string = JsonToString(GetValue(it)); + } + } + { + json_const_iterator it; + if (FindMember(o, "extras", it)) { + animation->extras_json_string = JsonToString(GetValue(it)); + } + } + } + + return true; +} + +static bool ParseSampler(Sampler *sampler, std::string *err, const json &o, + bool store_original_json_for_extras_and_extensions) { + ParseStringProperty(&sampler->name, err, o, "name", false); + + int minFilter = -1; + int magFilter = -1; + int wrapS = TINYGLTF_TEXTURE_WRAP_REPEAT; + int wrapT = TINYGLTF_TEXTURE_WRAP_REPEAT; + //int wrapR = TINYGLTF_TEXTURE_WRAP_REPEAT; + ParseIntegerProperty(&minFilter, err, o, "minFilter", false); + ParseIntegerProperty(&magFilter, err, o, "magFilter", false); + ParseIntegerProperty(&wrapS, err, o, "wrapS", false); + ParseIntegerProperty(&wrapT, err, o, "wrapT", false); + //ParseIntegerProperty(&wrapR, err, o, "wrapR", false); // tinygltf extension + + // TODO(syoyo): Check the value is alloed one. + // (e.g. we allow 9728(NEAREST), but don't allow 9727) + + sampler->minFilter = minFilter; + sampler->magFilter = magFilter; + sampler->wrapS = wrapS; + sampler->wrapT = wrapT; + //sampler->wrapR = wrapR; + + ParseExtensionsProperty(&(sampler->extensions), err, o); + ParseExtrasProperty(&(sampler->extras), o); + + if (store_original_json_for_extras_and_extensions) { + { + json_const_iterator it; + if (FindMember(o, "extensions", it)) { + sampler->extensions_json_string = JsonToString(GetValue(it)); + } + } + { + json_const_iterator it; + if (FindMember(o, "extras", it)) { + sampler->extras_json_string = JsonToString(GetValue(it)); + } + } + } + + return true; +} + +static bool ParseSkin(Skin *skin, std::string *err, const json &o, + bool store_original_json_for_extras_and_extensions) { + ParseStringProperty(&skin->name, err, o, "name", false, "Skin"); + + std::vector joints; + if (!ParseIntegerArrayProperty(&joints, err, o, "joints", false, "Skin")) { + return false; + } + skin->joints = std::move(joints); + + int skeleton = -1; + ParseIntegerProperty(&skeleton, err, o, "skeleton", false, "Skin"); + skin->skeleton = skeleton; + + int invBind = -1; + ParseIntegerProperty(&invBind, err, o, "inverseBindMatrices", true, "Skin"); + skin->inverseBindMatrices = invBind; + + ParseExtensionsProperty(&(skin->extensions), err, o); + ParseExtrasProperty(&(skin->extras), o); + + if (store_original_json_for_extras_and_extensions) { + { + json_const_iterator it; + if (FindMember(o, "extensions", it)) { + skin->extensions_json_string = JsonToString(GetValue(it)); + } + } + { + json_const_iterator it; + if (FindMember(o, "extras", it)) { + skin->extras_json_string = JsonToString(GetValue(it)); + } + } + } + + return true; +} + +static bool ParsePerspectiveCamera( + PerspectiveCamera *camera, std::string *err, const json &o, + bool store_original_json_for_extras_and_extensions) { + double yfov = 0.0; + if (!ParseNumberProperty(&yfov, err, o, "yfov", true, "OrthographicCamera")) { + return false; + } + + double znear = 0.0; + if (!ParseNumberProperty(&znear, err, o, "znear", true, + "PerspectiveCamera")) { + return false; + } + + double aspectRatio = 0.0; // = invalid + ParseNumberProperty(&aspectRatio, err, o, "aspectRatio", false, + "PerspectiveCamera"); + + double zfar = 0.0; // = invalid + ParseNumberProperty(&zfar, err, o, "zfar", false, "PerspectiveCamera"); + + camera->aspectRatio = aspectRatio; + camera->zfar = zfar; + camera->yfov = yfov; + camera->znear = znear; + + ParseExtensionsProperty(&camera->extensions, err, o); + ParseExtrasProperty(&(camera->extras), o); + + if (store_original_json_for_extras_and_extensions) { + { + json_const_iterator it; + if (FindMember(o, "extensions", it)) { + camera->extensions_json_string = JsonToString(GetValue(it)); + } + } + { + json_const_iterator it; + if (FindMember(o, "extras", it)) { + camera->extras_json_string = JsonToString(GetValue(it)); + } + } + } + + // TODO(syoyo): Validate parameter values. + + return true; +} + +static bool ParseSpotLight(SpotLight *light, std::string *err, const json &o, + bool store_original_json_for_extras_and_extensions) { + ParseNumberProperty(&light->innerConeAngle, err, o, "innerConeAngle", false); + ParseNumberProperty(&light->outerConeAngle, err, o, "outerConeAngle", false); + + ParseExtensionsProperty(&light->extensions, err, o); + ParseExtrasProperty(&light->extras, o); + + if (store_original_json_for_extras_and_extensions) { + { + json_const_iterator it; + if (FindMember(o, "extensions", it)) { + light->extensions_json_string = JsonToString(GetValue(it)); + } + } + { + json_const_iterator it; + if (FindMember(o, "extras", it)) { + light->extras_json_string = JsonToString(GetValue(it)); + } + } + } + + // TODO(syoyo): Validate parameter values. + + return true; +} + +static bool ParseOrthographicCamera( + OrthographicCamera *camera, std::string *err, const json &o, + bool store_original_json_for_extras_and_extensions) { + double xmag = 0.0; + if (!ParseNumberProperty(&xmag, err, o, "xmag", true, "OrthographicCamera")) { + return false; + } + + double ymag = 0.0; + if (!ParseNumberProperty(&ymag, err, o, "ymag", true, "OrthographicCamera")) { + return false; + } + + double zfar = 0.0; + if (!ParseNumberProperty(&zfar, err, o, "zfar", true, "OrthographicCamera")) { + return false; + } + + double znear = 0.0; + if (!ParseNumberProperty(&znear, err, o, "znear", true, + "OrthographicCamera")) { + return false; + } + + ParseExtensionsProperty(&camera->extensions, err, o); + ParseExtrasProperty(&(camera->extras), o); + + if (store_original_json_for_extras_and_extensions) { + { + json_const_iterator it; + if (FindMember(o, "extensions", it)) { + camera->extensions_json_string = JsonToString(GetValue(it)); + } + } + { + json_const_iterator it; + if (FindMember(o, "extras", it)) { + camera->extras_json_string = JsonToString(GetValue(it)); + } + } + } + + camera->xmag = xmag; + camera->ymag = ymag; + camera->zfar = zfar; + camera->znear = znear; + + // TODO(syoyo): Validate parameter values. + + return true; +} + +static bool ParseCamera(Camera *camera, std::string *err, const json &o, + bool store_original_json_for_extras_and_extensions) { + if (!ParseStringProperty(&camera->type, err, o, "type", true, "Camera")) { + return false; + } + + if (camera->type.compare("orthographic") == 0) { + json_const_iterator orthoIt; + if (!FindMember(o, "orthographic", orthoIt)) { + if (err) { + std::stringstream ss; + ss << "Orhographic camera description not found." << std::endl; + (*err) += ss.str(); + } + return false; + } + + const json &v = GetValue(orthoIt); + if (!IsObject(v)) { + if (err) { + std::stringstream ss; + ss << "\"orthographic\" is not a JSON object." << std::endl; + (*err) += ss.str(); + } + return false; + } + + if (!ParseOrthographicCamera( + &camera->orthographic, err, v, + store_original_json_for_extras_and_extensions)) { + return false; + } + } else if (camera->type.compare("perspective") == 0) { + json_const_iterator perspIt; + if (!FindMember(o, "perspective", perspIt)) { + if (err) { + std::stringstream ss; + ss << "Perspective camera description not found." << std::endl; + (*err) += ss.str(); + } + return false; + } + + const json &v = GetValue(perspIt); + if (!IsObject(v)) { + if (err) { + std::stringstream ss; + ss << "\"perspective\" is not a JSON object." << std::endl; + (*err) += ss.str(); + } + return false; + } + + if (!ParsePerspectiveCamera( + &camera->perspective, err, v, + store_original_json_for_extras_and_extensions)) { + return false; + } + } else { + if (err) { + std::stringstream ss; + ss << "Invalid camera type: \"" << camera->type + << "\". Must be \"perspective\" or \"orthographic\"" << std::endl; + (*err) += ss.str(); + } + return false; + } + + ParseStringProperty(&camera->name, err, o, "name", false); + + ParseExtensionsProperty(&camera->extensions, err, o); + ParseExtrasProperty(&(camera->extras), o); + + if (store_original_json_for_extras_and_extensions) { + { + json_const_iterator it; + if (FindMember(o, "extensions", it)) { + camera->extensions_json_string = JsonToString(GetValue(it)); + } + } + { + json_const_iterator it; + if (FindMember(o, "extras", it)) { + camera->extras_json_string = JsonToString(GetValue(it)); + } + } + } + + return true; +} + +static bool ParseLight(Light *light, std::string *err, const json &o, + bool store_original_json_for_extras_and_extensions) { + if (!ParseStringProperty(&light->type, err, o, "type", true)) { + return false; + } + + if (light->type == "spot") { + json_const_iterator spotIt; + if (!FindMember(o, "spot", spotIt)) { + if (err) { + std::stringstream ss; + ss << "Spot light description not found." << std::endl; + (*err) += ss.str(); + } + return false; + } + + const json &v = GetValue(spotIt); + if (!IsObject(v)) { + if (err) { + std::stringstream ss; + ss << "\"spot\" is not a JSON object." << std::endl; + (*err) += ss.str(); + } + return false; + } + + if (!ParseSpotLight(&light->spot, err, v, + store_original_json_for_extras_and_extensions)) { + return false; + } + } + + ParseStringProperty(&light->name, err, o, "name", false); + ParseNumberArrayProperty(&light->color, err, o, "color", false); + ParseNumberProperty(&light->range, err, o, "range", false); + ParseNumberProperty(&light->intensity, err, o, "intensity", false); + ParseExtensionsProperty(&light->extensions, err, o); + ParseExtrasProperty(&(light->extras), o); + + if (store_original_json_for_extras_and_extensions) { + { + json_const_iterator it; + if (FindMember(o, "extensions", it)) { + light->extensions_json_string = JsonToString(GetValue(it)); + } + } + { + json_const_iterator it; + if (FindMember(o, "extras", it)) { + light->extras_json_string = JsonToString(GetValue(it)); + } + } + } + + return true; +} + +bool TinyGLTF::LoadFromString(Model *model, std::string *err, std::string *warn, + const char *json_str, + unsigned int json_str_length, + const std::string &base_dir, + unsigned int check_sections) { + if (json_str_length < 4) { + if (err) { + (*err) = "JSON string too short.\n"; + } + return false; + } + + JsonDocument v; + +#if (defined(__cpp_exceptions) || defined(__EXCEPTIONS) || \ + defined(_CPPUNWIND)) && \ + !defined(TINYGLTF_NOEXCEPTION) + try { + JsonParse(v, json_str, json_str_length, true); + + } catch (const std::exception &e) { + if (err) { + (*err) = e.what(); + } + return false; + } +#else + { + JsonParse(v, json_str, json_str_length); + + if (!IsObject(v)) { + // Assume parsing was failed. + if (err) { + (*err) = "Failed to parse JSON object\n"; + } + return false; + } + } +#endif + + if (!IsObject(v)) { + // root is not an object. + if (err) { + (*err) = "Root element is not a JSON object\n"; + } + return false; + } + + { + bool version_found = false; + json_const_iterator it; + if (FindMember(v, "asset", it) && IsObject(GetValue(it))) { + auto &itObj = GetValue(it); + json_const_iterator version_it; + std::string versionStr; + if (FindMember(itObj, "version", version_it) && + GetString(GetValue(version_it), versionStr)) { + version_found = true; + } + } + if (version_found) { + // OK + } else if (check_sections & REQUIRE_VERSION) { + if (err) { + (*err) += "\"asset\" object not found in .gltf or not an object type\n"; + } + return false; + } + } + + // scene is not mandatory. + // FIXME Maybe a better way to handle it than removing the code + + auto IsArrayMemberPresent = [](const json &_v, const char *name) -> bool { + json_const_iterator it; + return FindMember(_v, name, it) && IsArray(GetValue(it)); + }; + + { + if ((check_sections & REQUIRE_SCENES) && + !IsArrayMemberPresent(v, "scenes")) { + if (err) { + (*err) += "\"scenes\" object not found in .gltf or not an array type\n"; + } + return false; + } + } + + { + if ((check_sections & REQUIRE_NODES) && !IsArrayMemberPresent(v, "nodes")) { + if (err) { + (*err) += "\"nodes\" object not found in .gltf\n"; + } + return false; + } + } + + { + if ((check_sections & REQUIRE_ACCESSORS) && + !IsArrayMemberPresent(v, "accessors")) { + if (err) { + (*err) += "\"accessors\" object not found in .gltf\n"; + } + return false; + } + } + + { + if ((check_sections & REQUIRE_BUFFERS) && + !IsArrayMemberPresent(v, "buffers")) { + if (err) { + (*err) += "\"buffers\" object not found in .gltf\n"; + } + return false; + } + } + + { + if ((check_sections & REQUIRE_BUFFER_VIEWS) && + !IsArrayMemberPresent(v, "bufferViews")) { + if (err) { + (*err) += "\"bufferViews\" object not found in .gltf\n"; + } + return false; + } + } + + model->buffers.clear(); + model->bufferViews.clear(); + model->accessors.clear(); + model->meshes.clear(); + model->cameras.clear(); + model->nodes.clear(); + model->extensionsUsed.clear(); + model->extensionsRequired.clear(); + model->extensions.clear(); + model->defaultScene = -1; + + // 1. Parse Asset + { + json_const_iterator it; + if (FindMember(v, "asset", it) && IsObject(GetValue(it))) { + const json &root = GetValue(it); + + ParseAsset(&model->asset, err, root, + store_original_json_for_extras_and_extensions_); + } + } + +#ifdef TINYGLTF_USE_CPP14 + auto ForEachInArray = [](const json &_v, const char *member, + const auto &cb) -> bool +#else + // The std::function<> implementation can be less efficient because it will + // allocate heap when the size of the captured lambda is above 16 bytes with + // clang and gcc, but it does not require C++14. + auto ForEachInArray = [](const json &_v, const char *member, + const std::function &cb) -> bool +#endif + { + json_const_iterator itm; + if (FindMember(_v, member, itm) && IsArray(GetValue(itm))) { + const json &root = GetValue(itm); + auto it = ArrayBegin(root); + auto end = ArrayEnd(root); + for (; it != end; ++it) { + if (!cb(*it)) return false; + } + } + return true; + }; + + // 2. Parse extensionUsed + { + ForEachInArray(v, "extensionsUsed", [&](const json &o) { + std::string str; + GetString(o, str); + model->extensionsUsed.emplace_back(std::move(str)); + return true; + }); + } + + { + ForEachInArray(v, "extensionsRequired", [&](const json &o) { + std::string str; + GetString(o, str); + model->extensionsRequired.emplace_back(std::move(str)); + return true; + }); + } + + // 3. Parse Buffer + { + bool success = ForEachInArray(v, "buffers", [&](const json &o) { + if (!IsObject(o)) { + if (err) { + (*err) += "`buffers' does not contain an JSON object."; + } + return false; + } + Buffer buffer; + if (!ParseBuffer(&buffer, err, o, + store_original_json_for_extras_and_extensions_, &fs, + base_dir, is_binary_, bin_data_, bin_size_)) { + return false; + } + + model->buffers.emplace_back(std::move(buffer)); + return true; + }); + + if (!success) { + return false; + } + } + // 4. Parse BufferView + { + bool success = ForEachInArray(v, "bufferViews", [&](const json &o) { + if (!IsObject(o)) { + if (err) { + (*err) += "`bufferViews' does not contain an JSON object."; + } + return false; + } + BufferView bufferView; + if (!ParseBufferView(&bufferView, err, o, + store_original_json_for_extras_and_extensions_)) { + return false; + } + + model->bufferViews.emplace_back(std::move(bufferView)); + return true; + }); + + if (!success) { + return false; + } + } + + // 5. Parse Accessor + { + bool success = ForEachInArray(v, "accessors", [&](const json &o) { + if (!IsObject(o)) { + if (err) { + (*err) += "`accessors' does not contain an JSON object."; + } + return false; + } + Accessor accessor; + if (!ParseAccessor(&accessor, err, o, + store_original_json_for_extras_and_extensions_)) { + return false; + } + + model->accessors.emplace_back(std::move(accessor)); + return true; + }); + + if (!success) { + return false; + } + } + + // 6. Parse Mesh + { + bool success = ForEachInArray(v, "meshes", [&](const json &o) { + if (!IsObject(o)) { + if (err) { + (*err) += "`meshes' does not contain an JSON object."; + } + return false; + } + Mesh mesh; + if (!ParseMesh(&mesh, model, err, o, + store_original_json_for_extras_and_extensions_)) { + return false; + } + + model->meshes.emplace_back(std::move(mesh)); + return true; + }); + + if (!success) { + return false; + } + } + + // Assign missing bufferView target types + // - Look for missing Mesh indices + // - Look for missing Mesh attributes + for (auto &mesh : model->meshes) { + for (auto &primitive : mesh.primitives) { + if (primitive.indices > + -1) // has indices from parsing step, must be Element Array Buffer + { + if (size_t(primitive.indices) >= model->accessors.size()) { + if (err) { + (*err) += "primitive indices accessor out of bounds"; + } + return false; + } + + auto bufferView = + model->accessors[size_t(primitive.indices)].bufferView; + if (bufferView < 0 || size_t(bufferView) >= model->bufferViews.size()) { + if (err) { + (*err) += "accessor[" + std::to_string(primitive.indices) + + "] invalid bufferView"; + } + return false; + } + + model->bufferViews[size_t(bufferView)].target = + TINYGLTF_TARGET_ELEMENT_ARRAY_BUFFER; + // we could optionally check if acessors' bufferView type is Scalar, as + // it should be + } + + for (auto &attribute : primitive.attributes) { + model + ->bufferViews[size_t( + model->accessors[size_t(attribute.second)].bufferView)] + .target = TINYGLTF_TARGET_ARRAY_BUFFER; + } + + for (auto &target : primitive.targets) { + for (auto &attribute : target) { + auto bufferView = + model->accessors[size_t(attribute.second)].bufferView; + // bufferView could be null(-1) for sparse morph target + if (bufferView >= 0) { + model->bufferViews[size_t(bufferView)].target = + TINYGLTF_TARGET_ARRAY_BUFFER; + } + } + } + } + } + + // 7. Parse Node + { + bool success = ForEachInArray(v, "nodes", [&](const json &o) { + if (!IsObject(o)) { + if (err) { + (*err) += "`nodes' does not contain an JSON object."; + } + return false; + } + Node node; + if (!ParseNode(&node, err, o, + store_original_json_for_extras_and_extensions_)) { + return false; + } + + model->nodes.emplace_back(std::move(node)); + return true; + }); + + if (!success) { + return false; + } + } + + // 8. Parse scenes. + { + bool success = ForEachInArray(v, "scenes", [&](const json &o) { + if (!IsObject(o)) { + if (err) { + (*err) += "`scenes' does not contain an JSON object."; + } + return false; + } + std::vector nodes; + ParseIntegerArrayProperty(&nodes, err, o, "nodes", false); + + Scene scene; + scene.nodes = std::move(nodes); + + ParseStringProperty(&scene.name, err, o, "name", false); + + ParseExtensionsProperty(&scene.extensions, err, o); + ParseExtrasProperty(&scene.extras, o); + + if (store_original_json_for_extras_and_extensions_) { + { + json_const_iterator it; + if (FindMember(o, "extensions", it)) { + scene.extensions_json_string = JsonToString(GetValue(it)); + } + } + { + json_const_iterator it; + if (FindMember(o, "extras", it)) { + scene.extras_json_string = JsonToString(GetValue(it)); + } + } + } + + model->scenes.emplace_back(std::move(scene)); + return true; + }); + + if (!success) { + return false; + } + } + + // 9. Parse default scenes. + { + json_const_iterator rootIt; + int iVal; + if (FindMember(v, "scene", rootIt) && GetInt(GetValue(rootIt), iVal)) { + model->defaultScene = iVal; + } + } + + // 10. Parse Material + { + bool success = ForEachInArray(v, "materials", [&](const json &o) { + if (!IsObject(o)) { + if (err) { + (*err) += "`materials' does not contain an JSON object."; + } + return false; + } + Material material; + ParseStringProperty(&material.name, err, o, "name", false); + + if (!ParseMaterial(&material, err, o, + store_original_json_for_extras_and_extensions_)) { + return false; + } + + model->materials.emplace_back(std::move(material)); + return true; + }); + + if (!success) { + return false; + } + } + + // 11. Parse Image + void *load_image_user_data{nullptr}; + + LoadImageDataOption load_image_option; + + if (user_image_loader_) { + // Use user supplied pointer + load_image_user_data = load_image_user_data_; + } else { + load_image_option.preserve_channels = preserve_image_channels_; + load_image_user_data = reinterpret_cast(&load_image_option); + } + + { + int idx = 0; + bool success = ForEachInArray(v, "images", [&](const json &o) { + if (!IsObject(o)) { + if (err) { + (*err) += "image[" + std::to_string(idx) + "] is not a JSON object."; + } + return false; + } + Image image; + if (!ParseImage(&image, idx, err, warn, o, + store_original_json_for_extras_and_extensions_, base_dir, + &fs, &this->LoadImageData, load_image_user_data)) { + return false; + } + + if (image.bufferView != -1) { + // Load image from the buffer view. + if (size_t(image.bufferView) >= model->bufferViews.size()) { + if (err) { + std::stringstream ss; + ss << "image[" << idx << "] bufferView \"" << image.bufferView + << "\" not found in the scene." << std::endl; + (*err) += ss.str(); + } + return false; + } + + const BufferView &bufferView = + model->bufferViews[size_t(image.bufferView)]; + if (size_t(bufferView.buffer) >= model->buffers.size()) { + if (err) { + std::stringstream ss; + ss << "image[" << idx << "] buffer \"" << bufferView.buffer + << "\" not found in the scene." << std::endl; + (*err) += ss.str(); + } + return false; + } + const Buffer &buffer = model->buffers[size_t(bufferView.buffer)]; + + if (*LoadImageData == nullptr) { + if (err) { + (*err) += "No LoadImageData callback specified.\n"; + } + return false; + } + bool ret = LoadImageData( + &image, idx, err, warn, image.width, image.height, + &buffer.data[bufferView.byteOffset], + static_cast(bufferView.byteLength), load_image_user_data); + if (!ret) { + return false; + } + } + + model->images.emplace_back(std::move(image)); + ++idx; + return true; + }); + + if (!success) { + return false; + } + } + + // 12. Parse Texture + { + bool success = ForEachInArray(v, "textures", [&](const json &o) { + if (!IsObject(o)) { + if (err) { + (*err) += "`textures' does not contain an JSON object."; + } + return false; + } + Texture texture; + if (!ParseTexture(&texture, err, o, + store_original_json_for_extras_and_extensions_, + base_dir)) { + return false; + } + + model->textures.emplace_back(std::move(texture)); + return true; + }); + + if (!success) { + return false; + } + } + + // 13. Parse Animation + { + bool success = ForEachInArray(v, "animations", [&](const json &o) { + if (!IsObject(o)) { + if (err) { + (*err) += "`animations' does not contain an JSON object."; + } + return false; + } + Animation animation; + if (!ParseAnimation(&animation, err, o, + store_original_json_for_extras_and_extensions_)) { + return false; + } + + model->animations.emplace_back(std::move(animation)); + return true; + }); + + if (!success) { + return false; + } + } + + // 14. Parse Skin + { + bool success = ForEachInArray(v, "skins", [&](const json &o) { + if (!IsObject(o)) { + if (err) { + (*err) += "`skins' does not contain an JSON object."; + } + return false; + } + Skin skin; + if (!ParseSkin(&skin, err, o, + store_original_json_for_extras_and_extensions_)) { + return false; + } + + model->skins.emplace_back(std::move(skin)); + return true; + }); + + if (!success) { + return false; + } + } + + // 15. Parse Sampler + { + bool success = ForEachInArray(v, "samplers", [&](const json &o) { + if (!IsObject(o)) { + if (err) { + (*err) += "`samplers' does not contain an JSON object."; + } + return false; + } + Sampler sampler; + if (!ParseSampler(&sampler, err, o, + store_original_json_for_extras_and_extensions_)) { + return false; + } + + model->samplers.emplace_back(std::move(sampler)); + return true; + }); + + if (!success) { + return false; + } + } + + // 16. Parse Camera + { + bool success = ForEachInArray(v, "cameras", [&](const json &o) { + if (!IsObject(o)) { + if (err) { + (*err) += "`cameras' does not contain an JSON object."; + } + return false; + } + Camera camera; + if (!ParseCamera(&camera, err, o, + store_original_json_for_extras_and_extensions_)) { + return false; + } + + model->cameras.emplace_back(std::move(camera)); + return true; + }); + + if (!success) { + return false; + } + } + + // 17. Parse Extensions + ParseExtensionsProperty(&model->extensions, err, v); + + // 18. Specific extension implementations + { + json_const_iterator rootIt; + if (FindMember(v, "extensions", rootIt) && IsObject(GetValue(rootIt))) { + const json &root = GetValue(rootIt); + + json_const_iterator it(ObjectBegin(root)); + json_const_iterator itEnd(ObjectEnd(root)); + for (; it != itEnd; ++it) { + // parse KHR_lights_punctual extension + std::string key(GetKey(it)); + if ((key == "KHR_lights_punctual") && IsObject(GetValue(it))) { + const json &object = GetValue(it); + json_const_iterator itLight; + if (FindMember(object, "lights", itLight)) { + const json &lights = GetValue(itLight); + if (!IsArray(lights)) { + continue; + } + + auto arrayIt(ArrayBegin(lights)); + auto arrayItEnd(ArrayEnd(lights)); + for (; arrayIt != arrayItEnd; ++arrayIt) { + Light light; + if (!ParseLight(&light, err, *arrayIt, + store_original_json_for_extras_and_extensions_)) { + return false; + } + model->lights.emplace_back(std::move(light)); + } + } + } + } + } + } + + // 19. Parse Extras + ParseExtrasProperty(&model->extras, v); + + if (store_original_json_for_extras_and_extensions_) { + model->extras_json_string = JsonToString(v["extras"]); + model->extensions_json_string = JsonToString(v["extensions"]); + } + + return true; +} + +bool TinyGLTF::LoadASCIIFromString(Model *model, std::string *err, + std::string *warn, const char *str, + unsigned int length, + const std::string &base_dir, + unsigned int check_sections) { + is_binary_ = false; + bin_data_ = nullptr; + bin_size_ = 0; + + return LoadFromString(model, err, warn, str, length, base_dir, + check_sections); +} + +bool TinyGLTF::LoadASCIIFromFile(Model *model, std::string *err, + std::string *warn, const std::string &filename, + unsigned int check_sections) { + std::stringstream ss; + + if (fs.ReadWholeFile == nullptr) { + // Programmer error, assert() ? + ss << "Failed to read file: " << filename + << ": one or more FS callback not set" << std::endl; + if (err) { + (*err) = ss.str(); + } + return false; + } + + std::vector data; + std::string fileerr; + bool fileread = fs.ReadWholeFile(&data, &fileerr, filename, fs.user_data); + if (!fileread) { + ss << "Failed to read file: " << filename << ": " << fileerr << std::endl; + if (err) { + (*err) = ss.str(); + } + return false; + } + + size_t sz = data.size(); + if (sz == 0) { + if (err) { + (*err) = "Empty file."; + } + return false; + } + + std::string basedir = GetBaseDir(filename); + + bool ret = LoadASCIIFromString( + model, err, warn, reinterpret_cast(&data.at(0)), + static_cast(data.size()), basedir, check_sections); + + return ret; +} + +bool TinyGLTF::LoadBinaryFromMemory(Model *model, std::string *err, + std::string *warn, + const unsigned char *bytes, + unsigned int size, + const std::string &base_dir, + unsigned int check_sections) { + if (size < 20) { + if (err) { + (*err) = "Too short data size for glTF Binary."; + } + return false; + } + + if (bytes[0] == 'g' && bytes[1] == 'l' && bytes[2] == 'T' && + bytes[3] == 'F') { + // ok + } else { + if (err) { + (*err) = "Invalid magic."; + } + return false; + } + + unsigned int version; // 4 bytes + unsigned int length; // 4 bytes + unsigned int model_length; // 4 bytes + unsigned int model_format; // 4 bytes; + + // @todo { Endian swap for big endian machine. } + memcpy(&version, bytes + 4, 4); + swap4(&version); + memcpy(&length, bytes + 8, 4); + swap4(&length); + memcpy(&model_length, bytes + 12, 4); + swap4(&model_length); + memcpy(&model_format, bytes + 16, 4); + swap4(&model_format); + + // In case the Bin buffer is not present, the size is exactly 20 + size of + // JSON contents, + // so use "greater than" operator. + if ((20 + model_length > size) || (model_length < 1) || (length > size) || + (20 + model_length > length) || + (model_format != 0x4E4F534A)) { // 0x4E4F534A = JSON format. + if (err) { + (*err) = "Invalid glTF binary."; + } + return false; + } + + // Extract JSON string. + std::string jsonString(reinterpret_cast(&bytes[20]), + model_length); + + is_binary_ = true; + bin_data_ = bytes + 20 + model_length + + 8; // 4 bytes (buffer_length) + 4 bytes(buffer_format) + bin_size_ = + length - (20 + model_length); // extract header + JSON scene data. + + bool ret = LoadFromString(model, err, warn, + reinterpret_cast(&bytes[20]), + model_length, base_dir, check_sections); + if (!ret) { + return ret; + } + + return true; +} + +bool TinyGLTF::LoadBinaryFromFile(Model *model, std::string *err, + std::string *warn, + const std::string &filename, + unsigned int check_sections) { + std::stringstream ss; + + if (fs.ReadWholeFile == nullptr) { + // Programmer error, assert() ? + ss << "Failed to read file: " << filename + << ": one or more FS callback not set" << std::endl; + if (err) { + (*err) = ss.str(); + } + return false; + } + + std::vector data; + std::string fileerr; + bool fileread = fs.ReadWholeFile(&data, &fileerr, filename, fs.user_data); + if (!fileread) { + ss << "Failed to read file: " << filename << ": " << fileerr << std::endl; + if (err) { + (*err) = ss.str(); + } + return false; + } + + std::string basedir = GetBaseDir(filename); + + bool ret = LoadBinaryFromMemory(model, err, warn, &data.at(0), + static_cast(data.size()), + basedir, check_sections); + + return ret; +} + +/////////////////////// +// GLTF Serialization +/////////////////////// +namespace { +json JsonFromString(const char *s) { +#ifdef TINYGLTF_USE_RAPIDJSON + return json(s, GetAllocator()); +#else + return json(s); +#endif +} + +void JsonAssign(json &dest, const json &src) { +#ifdef TINYGLTF_USE_RAPIDJSON + dest.CopyFrom(src, GetAllocator()); +#else + dest = src; +#endif +} + +void JsonAddMember(json &o, const char *key, json &&value) { +#ifdef TINYGLTF_USE_RAPIDJSON + if (!o.IsObject()) { + o.SetObject(); + } + o.AddMember(json(key, GetAllocator()), std::move(value), GetAllocator()); +#else + o[key] = std::move(value); +#endif +} + +void JsonPushBack(json &o, json &&value) { +#ifdef TINYGLTF_USE_RAPIDJSON + o.PushBack(std::move(value), GetAllocator()); +#else + o.push_back(std::move(value)); +#endif +} + +bool JsonIsNull(const json &o) { +#ifdef TINYGLTF_USE_RAPIDJSON + return o.IsNull(); +#else + return o.is_null(); +#endif +} + +void JsonSetObject(json &o) { +#ifdef TINYGLTF_USE_RAPIDJSON + o.SetObject(); +#else + o = o.object({}); +#endif +} + +void JsonReserveArray(json &o, size_t s) { +#ifdef TINYGLTF_USE_RAPIDJSON + o.SetArray(); + o.Reserve(static_cast(s), GetAllocator()); +#endif + (void)(o); + (void)(s); +} +} // namespace + +// typedef std::pair json_object_pair; + +template +static void SerializeNumberProperty(const std::string &key, T number, + json &obj) { + // obj.insert( + // json_object_pair(key, json(static_cast(number)))); + // obj[key] = static_cast(number); + JsonAddMember(obj, key.c_str(), json(number)); +} + +#ifdef TINYGLTF_USE_RAPIDJSON +template <> +void SerializeNumberProperty(const std::string &key, size_t number, json &obj) { + JsonAddMember(obj, key.c_str(), json(static_cast(number))); +} +#endif + +template +static void SerializeNumberArrayProperty(const std::string &key, + const std::vector &value, + json &obj) { + if (value.empty()) return; + + json ary; + JsonReserveArray(ary, value.size()); + for (const auto &s : value) { + JsonPushBack(ary, json(s)); + } + JsonAddMember(obj, key.c_str(), std::move(ary)); +} + +static void SerializeStringProperty(const std::string &key, + const std::string &value, json &obj) { + JsonAddMember(obj, key.c_str(), JsonFromString(value.c_str())); +} + +static void SerializeStringArrayProperty(const std::string &key, + const std::vector &value, + json &obj) { + json ary; + JsonReserveArray(ary, value.size()); + for (auto &s : value) { + JsonPushBack(ary, JsonFromString(s.c_str())); + } + JsonAddMember(obj, key.c_str(), std::move(ary)); +} + +static bool ValueToJson(const Value &value, json *ret) { + json obj; +#ifdef TINYGLTF_USE_RAPIDJSON + switch (value.Type()) { + case REAL_TYPE: + obj.SetDouble(value.Get()); + break; + case INT_TYPE: + obj.SetInt(value.Get()); + break; + case BOOL_TYPE: + obj.SetBool(value.Get()); + break; + case STRING_TYPE: + obj.SetString(value.Get().c_str(), GetAllocator()); + break; + case ARRAY_TYPE: { + obj.SetArray(); + obj.Reserve(static_cast(value.ArrayLen()), + GetAllocator()); + for (unsigned int i = 0; i < value.ArrayLen(); ++i) { + Value elementValue = value.Get(int(i)); + json elementJson; + if (ValueToJson(value.Get(int(i)), &elementJson)) + obj.PushBack(std::move(elementJson), GetAllocator()); + } + break; + } + case BINARY_TYPE: + // TODO + // obj = json(value.Get>()); + return false; + break; + case OBJECT_TYPE: { + obj.SetObject(); + Value::Object objMap = value.Get(); + for (auto &it : objMap) { + json elementJson; + if (ValueToJson(it.second, &elementJson)) { + obj.AddMember(json(it.first.c_str(), GetAllocator()), + std::move(elementJson), GetAllocator()); + } + } + break; + } + case NULL_TYPE: + default: + return false; + } +#else + switch (value.Type()) { + case REAL_TYPE: + obj = json(value.Get()); + break; + case INT_TYPE: + obj = json(value.Get()); + break; + case BOOL_TYPE: + obj = json(value.Get()); + break; + case STRING_TYPE: + obj = json(value.Get()); + break; + case ARRAY_TYPE: { + for (unsigned int i = 0; i < value.ArrayLen(); ++i) { + Value elementValue = value.Get(int(i)); + json elementJson; + if (ValueToJson(value.Get(int(i)), &elementJson)) + obj.push_back(elementJson); + } + break; + } + case BINARY_TYPE: + // TODO + // obj = json(value.Get>()); + return false; + break; + case OBJECT_TYPE: { + Value::Object objMap = value.Get(); + for (auto &it : objMap) { + json elementJson; + if (ValueToJson(it.second, &elementJson)) obj[it.first] = elementJson; + } + break; + } + case NULL_TYPE: + default: + return false; + } +#endif + if (ret) *ret = std::move(obj); + return true; +} + +static void SerializeValue(const std::string &key, const Value &value, + json &obj) { + json ret; + if (ValueToJson(value, &ret)) { + JsonAddMember(obj, key.c_str(), std::move(ret)); + } +} + +static void SerializeGltfBufferData(const std::vector &data, + json &o) { + std::string header = "data:application/octet-stream;base64,"; + if (data.size() > 0) { + std::string encodedData = + base64_encode(&data[0], static_cast(data.size())); + SerializeStringProperty("uri", header + encodedData, o); + } else { + // Issue #229 + // size 0 is allowd. Just emit mime header. + SerializeStringProperty("uri", header, o); + } +} + +static bool SerializeGltfBufferData(const std::vector &data, + const std::string &binFilename) { +#ifdef _WIN32 +#if defined(__GLIBCXX__) // mingw + int file_descriptor = _wopen(UTF8ToWchar(binFilename).c_str(), + _O_CREAT | _O_WRONLY | _O_TRUNC | _O_BINARY); + __gnu_cxx::stdio_filebuf wfile_buf( + file_descriptor, std::ios_base::out | std::ios_base::binary); + std::ostream output(&wfile_buf); + if (!wfile_buf.is_open()) return false; +#elif defined(_MSC_VER) + std::ofstream output(UTF8ToWchar(binFilename).c_str(), std::ofstream::binary); + if (!output.is_open()) return false; +#else + std::ofstream output(binFilename.c_str(), std::ofstream::binary); + if (!output.is_open()) return false; +#endif +#else + std::ofstream output(binFilename.c_str(), std::ofstream::binary); + if (!output.is_open()) return false; +#endif + if (data.size() > 0) { + output.write(reinterpret_cast(&data[0]), + std::streamsize(data.size())); + } else { + // Issue #229 + // size 0 will be still valid buffer data. + // write empty file. + } + return true; +} + +#if 0 // FIXME(syoyo): not used. will be removed in the future release. +static void SerializeParameterMap(ParameterMap ¶m, json &o) { + for (ParameterMap::iterator paramIt = param.begin(); paramIt != param.end(); + ++paramIt) { + if (paramIt->second.number_array.size()) { + SerializeNumberArrayProperty(paramIt->first, + paramIt->second.number_array, o); + } else if (paramIt->second.json_double_value.size()) { + json json_double_value; + for (std::map::iterator it = + paramIt->second.json_double_value.begin(); + it != paramIt->second.json_double_value.end(); ++it) { + if (it->first == "index") { + json_double_value[it->first] = paramIt->second.TextureIndex(); + } else { + json_double_value[it->first] = it->second; + } + } + + o[paramIt->first] = json_double_value; + } else if (!paramIt->second.string_value.empty()) { + SerializeStringProperty(paramIt->first, paramIt->second.string_value, o); + } else if (paramIt->second.has_number_value) { + o[paramIt->first] = paramIt->second.number_value; + } else { + o[paramIt->first] = paramIt->second.bool_value; + } + } +} +#endif + +static void SerializeExtensionMap(const ExtensionMap &extensions, json &o) { + if (!extensions.size()) return; + + json extMap; + for (ExtensionMap::const_iterator extIt = extensions.begin(); + extIt != extensions.end(); ++extIt) { + // Allow an empty object for extension(#97) + json ret; + bool isNull = true; + if (ValueToJson(extIt->second, &ret)) { + isNull = JsonIsNull(ret); + JsonAddMember(extMap, extIt->first.c_str(), std::move(ret)); + } + if (isNull) { + if (!(extIt->first.empty())) { // name should not be empty, but for sure + // create empty object so that an extension name is still included in + // json. + json empty; + JsonSetObject(empty); + JsonAddMember(extMap, extIt->first.c_str(), std::move(empty)); + } + } + } + JsonAddMember(o, "extensions", std::move(extMap)); +} + +static void SerializeGltfAccessor(Accessor &accessor, json &o) { + if (accessor.bufferView >= 0) + SerializeNumberProperty("bufferView", accessor.bufferView, o); + + if (accessor.byteOffset != 0) + SerializeNumberProperty("byteOffset", int(accessor.byteOffset), o); + + SerializeNumberProperty("componentType", accessor.componentType, o); + SerializeNumberProperty("count", accessor.count, o); + + if ((accessor.componentType == TINYGLTF_COMPONENT_TYPE_FLOAT) || + (accessor.componentType == TINYGLTF_COMPONENT_TYPE_DOUBLE)) { + SerializeNumberArrayProperty("min", accessor.minValues, o); + SerializeNumberArrayProperty("max", accessor.maxValues, o); + } else { + // Issue #301. Serialize as integer. + // Assume int value is within [-2**31-1, 2**31-1] + { + std::vector values; + std::transform(accessor.minValues.begin(), accessor.minValues.end(), + std::back_inserter(values), + [](double v) { return static_cast(v); }); + + SerializeNumberArrayProperty("min", values, o); + } + + { + std::vector values; + std::transform(accessor.maxValues.begin(), accessor.maxValues.end(), + std::back_inserter(values), + [](double v) { return static_cast(v); }); + + SerializeNumberArrayProperty("max", values, o); + } + } + + if (accessor.normalized) + SerializeValue("normalized", Value(accessor.normalized), o); + std::string type; + switch (accessor.type) { + case TINYGLTF_TYPE_SCALAR: + type = "SCALAR"; + break; + case TINYGLTF_TYPE_VEC2: + type = "VEC2"; + break; + case TINYGLTF_TYPE_VEC3: + type = "VEC3"; + break; + case TINYGLTF_TYPE_VEC4: + type = "VEC4"; + break; + case TINYGLTF_TYPE_MAT2: + type = "MAT2"; + break; + case TINYGLTF_TYPE_MAT3: + type = "MAT3"; + break; + case TINYGLTF_TYPE_MAT4: + type = "MAT4"; + break; + } + + SerializeStringProperty("type", type, o); + if (!accessor.name.empty()) SerializeStringProperty("name", accessor.name, o); + + if (accessor.extras.Type() != NULL_TYPE) { + SerializeValue("extras", accessor.extras, o); + } +} + +static void SerializeGltfAnimationChannel(AnimationChannel &channel, json &o) { + SerializeNumberProperty("sampler", channel.sampler, o); + { + json target; + SerializeNumberProperty("node", channel.target_node, target); + SerializeStringProperty("path", channel.target_path, target); + + SerializeExtensionMap(channel.target_extensions, target); + + JsonAddMember(o, "target", std::move(target)); + } + + if (channel.extras.Type() != NULL_TYPE) { + SerializeValue("extras", channel.extras, o); + } + + SerializeExtensionMap(channel.extensions, o); +} + +static void SerializeGltfAnimationSampler(AnimationSampler &sampler, json &o) { + SerializeNumberProperty("input", sampler.input, o); + SerializeNumberProperty("output", sampler.output, o); + SerializeStringProperty("interpolation", sampler.interpolation, o); + + if (sampler.extras.Type() != NULL_TYPE) { + SerializeValue("extras", sampler.extras, o); + } +} + +static void SerializeGltfAnimation(Animation &animation, json &o) { + if (!animation.name.empty()) + SerializeStringProperty("name", animation.name, o); + + { + json channels; + JsonReserveArray(channels, animation.channels.size()); + for (unsigned int i = 0; i < animation.channels.size(); ++i) { + json channel; + AnimationChannel gltfChannel = animation.channels[i]; + SerializeGltfAnimationChannel(gltfChannel, channel); + JsonPushBack(channels, std::move(channel)); + } + + JsonAddMember(o, "channels", std::move(channels)); + } + + { + json samplers; + JsonReserveArray(samplers, animation.samplers.size()); + for (unsigned int i = 0; i < animation.samplers.size(); ++i) { + json sampler; + AnimationSampler gltfSampler = animation.samplers[i]; + SerializeGltfAnimationSampler(gltfSampler, sampler); + JsonPushBack(samplers, std::move(sampler)); + } + JsonAddMember(o, "samplers", std::move(samplers)); + } + + if (animation.extras.Type() != NULL_TYPE) { + SerializeValue("extras", animation.extras, o); + } + + SerializeExtensionMap(animation.extensions, o); +} + +static void SerializeGltfAsset(Asset &asset, json &o) { + if (!asset.generator.empty()) { + SerializeStringProperty("generator", asset.generator, o); + } + + if (!asset.copyright.empty()) { + SerializeStringProperty("copyright", asset.copyright, o); + } + + if (asset.version.empty()) { + // Just in case + // `version` must be defined + asset.version = "2.0"; + } + + // TODO(syoyo): Do we need to check if `version` is greater or equal to 2.0? + SerializeStringProperty("version", asset.version, o); + + if (asset.extras.Keys().size()) { + SerializeValue("extras", asset.extras, o); + } + + SerializeExtensionMap(asset.extensions, o); +} + +static void SerializeGltfBufferBin(Buffer &buffer, json &o, + std::vector &binBuffer) { + SerializeNumberProperty("byteLength", buffer.data.size(), o); + binBuffer = buffer.data; + + if (buffer.name.size()) SerializeStringProperty("name", buffer.name, o); + + if (buffer.extras.Type() != NULL_TYPE) { + SerializeValue("extras", buffer.extras, o); + } +} + +static void SerializeGltfBuffer(Buffer &buffer, json &o) { + SerializeNumberProperty("byteLength", buffer.data.size(), o); + SerializeGltfBufferData(buffer.data, o); + + if (buffer.name.size()) SerializeStringProperty("name", buffer.name, o); + + if (buffer.extras.Type() != NULL_TYPE) { + SerializeValue("extras", buffer.extras, o); + } +} + +static bool SerializeGltfBuffer(Buffer &buffer, json &o, + const std::string &binFilename, + const std::string &binBaseFilename) { + if (!SerializeGltfBufferData(buffer.data, binFilename)) return false; + SerializeNumberProperty("byteLength", buffer.data.size(), o); + SerializeStringProperty("uri", binBaseFilename, o); + + if (buffer.name.size()) SerializeStringProperty("name", buffer.name, o); + + if (buffer.extras.Type() != NULL_TYPE) { + SerializeValue("extras", buffer.extras, o); + } + return true; +} + +static void SerializeGltfBufferView(BufferView &bufferView, json &o) { + SerializeNumberProperty("buffer", bufferView.buffer, o); + SerializeNumberProperty("byteLength", bufferView.byteLength, o); + + // byteStride is optional, minimum allowed is 4 + if (bufferView.byteStride >= 4) { + SerializeNumberProperty("byteStride", bufferView.byteStride, o); + } + // byteOffset is optional, default is 0 + if (bufferView.byteOffset > 0) { + SerializeNumberProperty("byteOffset", bufferView.byteOffset, o); + } + // Target is optional, check if it contains a valid value + if (bufferView.target == TINYGLTF_TARGET_ARRAY_BUFFER || + bufferView.target == TINYGLTF_TARGET_ELEMENT_ARRAY_BUFFER) { + SerializeNumberProperty("target", bufferView.target, o); + } + if (bufferView.name.size()) { + SerializeStringProperty("name", bufferView.name, o); + } + + if (bufferView.extras.Type() != NULL_TYPE) { + SerializeValue("extras", bufferView.extras, o); + } +} + +static void SerializeGltfImage(Image &image, json &o) { + // if uri empty, the mimeType and bufferview should be set + if (image.uri.empty()) { + SerializeStringProperty("mimeType", image.mimeType, o); + SerializeNumberProperty("bufferView", image.bufferView, o); + } else { + // TODO(syoyo): dlib::urilencode? + SerializeStringProperty("uri", image.uri, o); + } + + if (image.name.size()) { + SerializeStringProperty("name", image.name, o); + } + + if (image.extras.Type() != NULL_TYPE) { + SerializeValue("extras", image.extras, o); + } + + SerializeExtensionMap(image.extensions, o); +} + +static void SerializeGltfTextureInfo(TextureInfo &texinfo, json &o) { + SerializeNumberProperty("index", texinfo.index, o); + + if (texinfo.texCoord != 0) { + SerializeNumberProperty("texCoord", texinfo.texCoord, o); + } + + if (texinfo.extras.Type() != NULL_TYPE) { + SerializeValue("extras", texinfo.extras, o); + } + + SerializeExtensionMap(texinfo.extensions, o); +} + +static void SerializeGltfNormalTextureInfo(NormalTextureInfo &texinfo, + json &o) { + SerializeNumberProperty("index", texinfo.index, o); + + if (texinfo.texCoord != 0) { + SerializeNumberProperty("texCoord", texinfo.texCoord, o); + } + + if (!TINYGLTF_DOUBLE_EQUAL(texinfo.scale, 1.0)) { + SerializeNumberProperty("scale", texinfo.scale, o); + } + + if (texinfo.extras.Type() != NULL_TYPE) { + SerializeValue("extras", texinfo.extras, o); + } + + SerializeExtensionMap(texinfo.extensions, o); +} + +static void SerializeGltfOcclusionTextureInfo(OcclusionTextureInfo &texinfo, + json &o) { + SerializeNumberProperty("index", texinfo.index, o); + + if (texinfo.texCoord != 0) { + SerializeNumberProperty("texCoord", texinfo.texCoord, o); + } + + if (!TINYGLTF_DOUBLE_EQUAL(texinfo.strength, 1.0)) { + SerializeNumberProperty("strength", texinfo.strength, o); + } + + if (texinfo.extras.Type() != NULL_TYPE) { + SerializeValue("extras", texinfo.extras, o); + } + + SerializeExtensionMap(texinfo.extensions, o); +} + +static void SerializeGltfPbrMetallicRoughness(PbrMetallicRoughness &pbr, + json &o) { + std::vector default_baseColorFactor = {1.0, 1.0, 1.0, 1.0}; + if (!Equals(pbr.baseColorFactor, default_baseColorFactor)) { + SerializeNumberArrayProperty("baseColorFactor", pbr.baseColorFactor, + o); + } + + if (!TINYGLTF_DOUBLE_EQUAL(pbr.metallicFactor, 1.0)) { + SerializeNumberProperty("metallicFactor", pbr.metallicFactor, o); + } + + if (!TINYGLTF_DOUBLE_EQUAL(pbr.roughnessFactor, 1.0)) { + SerializeNumberProperty("roughnessFactor", pbr.roughnessFactor, o); + } + + if (pbr.baseColorTexture.index > -1) { + json texinfo; + SerializeGltfTextureInfo(pbr.baseColorTexture, texinfo); + JsonAddMember(o, "baseColorTexture", std::move(texinfo)); + } + + if (pbr.metallicRoughnessTexture.index > -1) { + json texinfo; + SerializeGltfTextureInfo(pbr.metallicRoughnessTexture, texinfo); + JsonAddMember(o, "metallicRoughnessTexture", std::move(texinfo)); + } + + SerializeExtensionMap(pbr.extensions, o); + + if (pbr.extras.Type() != NULL_TYPE) { + SerializeValue("extras", pbr.extras, o); + } +} + +static void SerializeGltfMaterial(Material &material, json &o) { + if (material.name.size()) { + SerializeStringProperty("name", material.name, o); + } + + // QUESTION(syoyo): Write material parameters regardless of its default value? + + if (!TINYGLTF_DOUBLE_EQUAL(material.alphaCutoff, 0.5)) { + SerializeNumberProperty("alphaCutoff", material.alphaCutoff, o); + } + + if (material.alphaMode.compare("OPAQUE") != 0) { + SerializeStringProperty("alphaMode", material.alphaMode, o); + } + + if (material.doubleSided != false) + JsonAddMember(o, "doubleSided", json(material.doubleSided)); + + if (material.normalTexture.index > -1) { + json texinfo; + SerializeGltfNormalTextureInfo(material.normalTexture, texinfo); + JsonAddMember(o, "normalTexture", std::move(texinfo)); + } + + if (material.occlusionTexture.index > -1) { + json texinfo; + SerializeGltfOcclusionTextureInfo(material.occlusionTexture, texinfo); + JsonAddMember(o, "occlusionTexture", std::move(texinfo)); + } + + if (material.emissiveTexture.index > -1) { + json texinfo; + SerializeGltfTextureInfo(material.emissiveTexture, texinfo); + JsonAddMember(o, "emissiveTexture", std::move(texinfo)); + } + + std::vector default_emissiveFactor = {0.0, 0.0, 0.0}; + if (!Equals(material.emissiveFactor, default_emissiveFactor)) { + SerializeNumberArrayProperty("emissiveFactor", + material.emissiveFactor, o); + } + + { + json pbrMetallicRoughness; + SerializeGltfPbrMetallicRoughness(material.pbrMetallicRoughness, + pbrMetallicRoughness); + // Issue 204 + // Do not serialize `pbrMetallicRoughness` if pbrMetallicRoughness has all + // default values(json is null). Otherwise it will serialize to + // `pbrMetallicRoughness : null`, which cannot be read by other glTF + // importers(and validators). + // + if (!JsonIsNull(pbrMetallicRoughness)) { + JsonAddMember(o, "pbrMetallicRoughness", std::move(pbrMetallicRoughness)); + } + } + +#if 0 // legacy way. just for the record. + if (material.values.size()) { + json pbrMetallicRoughness; + SerializeParameterMap(material.values, pbrMetallicRoughness); + JsonAddMember(o, "pbrMetallicRoughness", std::move(pbrMetallicRoughness)); + } + + SerializeParameterMap(material.additionalValues, o); +#else + +#endif + + SerializeExtensionMap(material.extensions, o); + + if (material.extras.Type() != NULL_TYPE) { + SerializeValue("extras", material.extras, o); + } +} + +static void SerializeGltfMesh(Mesh &mesh, json &o) { + json primitives; + JsonReserveArray(primitives, mesh.primitives.size()); + for (unsigned int i = 0; i < mesh.primitives.size(); ++i) { + json primitive; + const Primitive &gltfPrimitive = mesh.primitives[i]; // don't make a copy + { + json attributes; + for (auto attrIt = gltfPrimitive.attributes.begin(); + attrIt != gltfPrimitive.attributes.end(); ++attrIt) { + SerializeNumberProperty(attrIt->first, attrIt->second, attributes); + } + + JsonAddMember(primitive, "attributes", std::move(attributes)); + } + + // Indicies is optional + if (gltfPrimitive.indices > -1) { + SerializeNumberProperty("indices", gltfPrimitive.indices, primitive); + } + // Material is optional + if (gltfPrimitive.material > -1) { + SerializeNumberProperty("material", gltfPrimitive.material, + primitive); + } + SerializeNumberProperty("mode", gltfPrimitive.mode, primitive); + + // Morph targets + if (gltfPrimitive.targets.size()) { + json targets; + JsonReserveArray(targets, gltfPrimitive.targets.size()); + for (unsigned int k = 0; k < gltfPrimitive.targets.size(); ++k) { + json targetAttributes; + std::map targetData = gltfPrimitive.targets[k]; + for (std::map::iterator attrIt = targetData.begin(); + attrIt != targetData.end(); ++attrIt) { + SerializeNumberProperty(attrIt->first, attrIt->second, + targetAttributes); + } + JsonPushBack(targets, std::move(targetAttributes)); + } + JsonAddMember(primitive, "targets", std::move(targets)); + } + + SerializeExtensionMap(gltfPrimitive.extensions, primitive); + + if (gltfPrimitive.extras.Type() != NULL_TYPE) { + SerializeValue("extras", gltfPrimitive.extras, primitive); + } + + JsonPushBack(primitives, std::move(primitive)); + } + + JsonAddMember(o, "primitives", std::move(primitives)); + + if (mesh.weights.size()) { + SerializeNumberArrayProperty("weights", mesh.weights, o); + } + + if (mesh.name.size()) { + SerializeStringProperty("name", mesh.name, o); + } + + SerializeExtensionMap(mesh.extensions, o); + if (mesh.extras.Type() != NULL_TYPE) { + SerializeValue("extras", mesh.extras, o); + } +} + +static void SerializeSpotLight(SpotLight &spot, json &o) { + SerializeNumberProperty("innerConeAngle", spot.innerConeAngle, o); + SerializeNumberProperty("outerConeAngle", spot.outerConeAngle, o); + SerializeExtensionMap(spot.extensions, o); + if (spot.extras.Type() != NULL_TYPE) { + SerializeValue("extras", spot.extras, o); + } +} + +static void SerializeGltfLight(Light &light, json &o) { + if (!light.name.empty()) SerializeStringProperty("name", light.name, o); + SerializeNumberProperty("intensity", light.intensity, o); + if (light.range > 0.0) { + SerializeNumberProperty("range", light.range, o); + } + SerializeNumberArrayProperty("color", light.color, o); + SerializeStringProperty("type", light.type, o); + if (light.type == "spot") { + json spot; + SerializeSpotLight(light.spot, spot); + JsonAddMember(o, "spot", std::move(spot)); + } + SerializeExtensionMap(light.extensions, o); + if (light.extras.Type() != NULL_TYPE) { + SerializeValue("extras", light.extras, o); + } +} + +static void SerializeGltfNode(Node &node, json &o) { + if (node.translation.size() > 0) { + SerializeNumberArrayProperty("translation", node.translation, o); + } + if (node.rotation.size() > 0) { + SerializeNumberArrayProperty("rotation", node.rotation, o); + } + if (node.scale.size() > 0) { + SerializeNumberArrayProperty("scale", node.scale, o); + } + if (node.matrix.size() > 0) { + SerializeNumberArrayProperty("matrix", node.matrix, o); + } + if (node.mesh != -1) { + SerializeNumberProperty("mesh", node.mesh, o); + } + + if (node.skin != -1) { + SerializeNumberProperty("skin", node.skin, o); + } + + if (node.camera != -1) { + SerializeNumberProperty("camera", node.camera, o); + } + + if (node.weights.size() > 0) { + SerializeNumberArrayProperty("weights", node.weights, o); + } + + if (node.extras.Type() != NULL_TYPE) { + SerializeValue("extras", node.extras, o); + } + + SerializeExtensionMap(node.extensions, o); + if (!node.name.empty()) SerializeStringProperty("name", node.name, o); + SerializeNumberArrayProperty("children", node.children, o); +} + +static void SerializeGltfSampler(Sampler &sampler, json &o) { + if (sampler.magFilter != -1) { + SerializeNumberProperty("magFilter", sampler.magFilter, o); + } + if (sampler.minFilter != -1) { + SerializeNumberProperty("minFilter", sampler.minFilter, o); + } + //SerializeNumberProperty("wrapR", sampler.wrapR, o); + SerializeNumberProperty("wrapS", sampler.wrapS, o); + SerializeNumberProperty("wrapT", sampler.wrapT, o); + + if (sampler.extras.Type() != NULL_TYPE) { + SerializeValue("extras", sampler.extras, o); + } +} + +static void SerializeGltfOrthographicCamera(const OrthographicCamera &camera, + json &o) { + SerializeNumberProperty("zfar", camera.zfar, o); + SerializeNumberProperty("znear", camera.znear, o); + SerializeNumberProperty("xmag", camera.xmag, o); + SerializeNumberProperty("ymag", camera.ymag, o); + + if (camera.extras.Type() != NULL_TYPE) { + SerializeValue("extras", camera.extras, o); + } +} + +static void SerializeGltfPerspectiveCamera(const PerspectiveCamera &camera, + json &o) { + SerializeNumberProperty("zfar", camera.zfar, o); + SerializeNumberProperty("znear", camera.znear, o); + if (camera.aspectRatio > 0) { + SerializeNumberProperty("aspectRatio", camera.aspectRatio, o); + } + + if (camera.yfov > 0) { + SerializeNumberProperty("yfov", camera.yfov, o); + } + + if (camera.extras.Type() != NULL_TYPE) { + SerializeValue("extras", camera.extras, o); + } +} + +static void SerializeGltfCamera(const Camera &camera, json &o) { + SerializeStringProperty("type", camera.type, o); + if (!camera.name.empty()) { + SerializeStringProperty("name", camera.name, o); + } + + if (camera.type.compare("orthographic") == 0) { + json orthographic; + SerializeGltfOrthographicCamera(camera.orthographic, orthographic); + JsonAddMember(o, "orthographic", std::move(orthographic)); + } else if (camera.type.compare("perspective") == 0) { + json perspective; + SerializeGltfPerspectiveCamera(camera.perspective, perspective); + JsonAddMember(o, "perspective", std::move(perspective)); + } else { + // ??? + } + + if (camera.extras.Type() != NULL_TYPE) { + SerializeValue("extras", camera.extras, o); + } + SerializeExtensionMap(camera.extensions, o); +} + +static void SerializeGltfScene(Scene &scene, json &o) { + SerializeNumberArrayProperty("nodes", scene.nodes, o); + + if (scene.name.size()) { + SerializeStringProperty("name", scene.name, o); + } + if (scene.extras.Type() != NULL_TYPE) { + SerializeValue("extras", scene.extras, o); + } + SerializeExtensionMap(scene.extensions, o); +} + +static void SerializeGltfSkin(Skin &skin, json &o) { + // required + SerializeNumberArrayProperty("joints", skin.joints, o); + + if (skin.inverseBindMatrices >= 0) { + SerializeNumberProperty("inverseBindMatrices", skin.inverseBindMatrices, o); + } + + if (skin.skeleton >= 0) { + SerializeNumberProperty("skeleton", skin.skeleton, o); + } + + if (skin.name.size()) { + SerializeStringProperty("name", skin.name, o); + } +} + +static void SerializeGltfTexture(Texture &texture, json &o) { + if (texture.sampler > -1) { + SerializeNumberProperty("sampler", texture.sampler, o); + } + if (texture.source > -1) { + SerializeNumberProperty("source", texture.source, o); + } + if (texture.name.size()) { + SerializeStringProperty("name", texture.name, o); + } + if (texture.extras.Type() != NULL_TYPE) { + SerializeValue("extras", texture.extras, o); + } + SerializeExtensionMap(texture.extensions, o); +} + +/// +/// Serialize all properties except buffers and images. +/// +static void SerializeGltfModel(Model *model, json &o) { + // ACCESSORS + if (model->accessors.size()) { + json accessors; + JsonReserveArray(accessors, model->accessors.size()); + for (unsigned int i = 0; i < model->accessors.size(); ++i) { + json accessor; + SerializeGltfAccessor(model->accessors[i], accessor); + JsonPushBack(accessors, std::move(accessor)); + } + JsonAddMember(o, "accessors", std::move(accessors)); + } + + // ANIMATIONS + if (model->animations.size()) { + json animations; + JsonReserveArray(animations, model->animations.size()); + for (unsigned int i = 0; i < model->animations.size(); ++i) { + if (model->animations[i].channels.size()) { + json animation; + SerializeGltfAnimation(model->animations[i], animation); + JsonPushBack(animations, std::move(animation)); + } + } + + JsonAddMember(o, "animations", std::move(animations)); + } + + // ASSET + json asset; + SerializeGltfAsset(model->asset, asset); + JsonAddMember(o, "asset", std::move(asset)); + + // BUFFERVIEWS + if (model->bufferViews.size()) { + json bufferViews; + JsonReserveArray(bufferViews, model->bufferViews.size()); + for (unsigned int i = 0; i < model->bufferViews.size(); ++i) { + json bufferView; + SerializeGltfBufferView(model->bufferViews[i], bufferView); + JsonPushBack(bufferViews, std::move(bufferView)); + } + JsonAddMember(o, "bufferViews", std::move(bufferViews)); + } + + // Extensions required + if (model->extensionsRequired.size()) { + SerializeStringArrayProperty("extensionsRequired", + model->extensionsRequired, o); + } + + // MATERIALS + if (model->materials.size()) { + json materials; + JsonReserveArray(materials, model->materials.size()); + for (unsigned int i = 0; i < model->materials.size(); ++i) { + json material; + SerializeGltfMaterial(model->materials[i], material); + + if (JsonIsNull(material)) { + // Issue 294. + // `material` does not have any required parameters + // so the result may be null(unmodified) when all material parameters + // have default value. + // + // null is not allowed thus we create an empty JSON object. + JsonSetObject(material); + } + JsonPushBack(materials, std::move(material)); + } + JsonAddMember(o, "materials", std::move(materials)); + } + + // MESHES + if (model->meshes.size()) { + json meshes; + JsonReserveArray(meshes, model->meshes.size()); + for (unsigned int i = 0; i < model->meshes.size(); ++i) { + json mesh; + SerializeGltfMesh(model->meshes[i], mesh); + JsonPushBack(meshes, std::move(mesh)); + } + JsonAddMember(o, "meshes", std::move(meshes)); + } + + // NODES + if (model->nodes.size()) { + json nodes; + JsonReserveArray(nodes, model->nodes.size()); + for (unsigned int i = 0; i < model->nodes.size(); ++i) { + json node; + SerializeGltfNode(model->nodes[i], node); + JsonPushBack(nodes, std::move(node)); + } + JsonAddMember(o, "nodes", std::move(nodes)); + } + + // SCENE + if (model->defaultScene > -1) { + SerializeNumberProperty("scene", model->defaultScene, o); + } + + // SCENES + if (model->scenes.size()) { + json scenes; + JsonReserveArray(scenes, model->scenes.size()); + for (unsigned int i = 0; i < model->scenes.size(); ++i) { + json currentScene; + SerializeGltfScene(model->scenes[i], currentScene); + JsonPushBack(scenes, std::move(currentScene)); + } + JsonAddMember(o, "scenes", std::move(scenes)); + } + + // SKINS + if (model->skins.size()) { + json skins; + JsonReserveArray(skins, model->skins.size()); + for (unsigned int i = 0; i < model->skins.size(); ++i) { + json skin; + SerializeGltfSkin(model->skins[i], skin); + JsonPushBack(skins, std::move(skin)); + } + JsonAddMember(o, "skins", std::move(skins)); + } + + // TEXTURES + if (model->textures.size()) { + json textures; + JsonReserveArray(textures, model->textures.size()); + for (unsigned int i = 0; i < model->textures.size(); ++i) { + json texture; + SerializeGltfTexture(model->textures[i], texture); + JsonPushBack(textures, std::move(texture)); + } + JsonAddMember(o, "textures", std::move(textures)); + } + + // SAMPLERS + if (model->samplers.size()) { + json samplers; + JsonReserveArray(samplers, model->samplers.size()); + for (unsigned int i = 0; i < model->samplers.size(); ++i) { + json sampler; + SerializeGltfSampler(model->samplers[i], sampler); + JsonPushBack(samplers, std::move(sampler)); + } + JsonAddMember(o, "samplers", std::move(samplers)); + } + + // CAMERAS + if (model->cameras.size()) { + json cameras; + JsonReserveArray(cameras, model->cameras.size()); + for (unsigned int i = 0; i < model->cameras.size(); ++i) { + json camera; + SerializeGltfCamera(model->cameras[i], camera); + JsonPushBack(cameras, std::move(camera)); + } + JsonAddMember(o, "cameras", std::move(cameras)); + } + + // EXTENSIONS + SerializeExtensionMap(model->extensions, o); + + auto extensionsUsed = model->extensionsUsed; + + // LIGHTS as KHR_lights_punctual + if (model->lights.size()) { + json lights; + JsonReserveArray(lights, model->lights.size()); + for (unsigned int i = 0; i < model->lights.size(); ++i) { + json light; + SerializeGltfLight(model->lights[i], light); + JsonPushBack(lights, std::move(light)); + } + json khr_lights_cmn; + JsonAddMember(khr_lights_cmn, "lights", std::move(lights)); + json ext_j; + + { + json_const_iterator it; + if (FindMember(o, "extensions", it)) { + JsonAssign(ext_j, GetValue(it)); + } + } + + JsonAddMember(ext_j, "KHR_lights_punctual", std::move(khr_lights_cmn)); + + JsonAddMember(o, "extensions", std::move(ext_j)); + + // Also add "KHR_lights_punctual" to `extensionsUsed` + { + auto has_khr_lights_punctual = + std::find_if(extensionsUsed.begin(), extensionsUsed.end(), + [](const std::string &s) { + return (s.compare("KHR_lights_punctual") == 0); + }); + + if (has_khr_lights_punctual == extensionsUsed.end()) { + extensionsUsed.push_back("KHR_lights_punctual"); + } + } + } + + // Extensions used + if (extensionsUsed.size()) { + SerializeStringArrayProperty("extensionsUsed", extensionsUsed, o); + } + + // EXTRAS + if (model->extras.Type() != NULL_TYPE) { + SerializeValue("extras", model->extras, o); + } +} + +static bool WriteGltfStream(std::ostream &stream, const std::string &content) { + stream << content << std::endl; + return true; +} + +static bool WriteGltfFile(const std::string &output, + const std::string &content) { +#ifdef _WIN32 +#if defined(_MSC_VER) + std::ofstream gltfFile(UTF8ToWchar(output).c_str()); +#elif defined(__GLIBCXX__) + int file_descriptor = _wopen(UTF8ToWchar(output).c_str(), + _O_CREAT | _O_WRONLY | _O_TRUNC | _O_BINARY); + __gnu_cxx::stdio_filebuf wfile_buf( + file_descriptor, std::ios_base::out | std::ios_base::binary); + std::ostream gltfFile(&wfile_buf); + if (!wfile_buf.is_open()) return false; +#else + std::ofstream gltfFile(output.c_str()); + if (!gltfFile.is_open()) return false; +#endif +#else + std::ofstream gltfFile(output.c_str()); + if (!gltfFile.is_open()) return false; +#endif + return WriteGltfStream(gltfFile, content); +} + +static void WriteBinaryGltfStream(std::ostream &stream, + const std::string &content, + const std::vector &binBuffer) { + const std::string header = "glTF"; + const int version = 2; + + const uint32_t content_size = uint32_t(content.size()); + const uint32_t binBuffer_size = uint32_t(binBuffer.size()); + // determine number of padding bytes required to ensure 4 byte alignment + const uint32_t content_padding_size = content_size % 4 == 0 ? 0 : 4 - content_size % 4; + const uint32_t bin_padding_size = binBuffer_size % 4 == 0 ? 0 : 4 - binBuffer_size % 4; + + // 12 bytes for header, JSON content length, 8 bytes for JSON chunk info. + // Chunk data must be located at 4-byte boundary, which may require padding + const uint32_t length = + 12 + 8 + content_size + content_padding_size + + (binBuffer_size ? (8 + binBuffer_size + bin_padding_size) : 0); + + stream.write(header.c_str(), std::streamsize(header.size())); + stream.write(reinterpret_cast(&version), sizeof(version)); + stream.write(reinterpret_cast(&length), sizeof(length)); + + // JSON chunk info, then JSON data + const uint32_t model_length = uint32_t(content.size()) + content_padding_size; + const uint32_t model_format = 0x4E4F534A; + stream.write(reinterpret_cast(&model_length), + sizeof(model_length)); + stream.write(reinterpret_cast(&model_format), + sizeof(model_format)); + stream.write(content.c_str(), std::streamsize(content.size())); + + // Chunk must be multiplies of 4, so pad with spaces + if (content_padding_size > 0) { + const std::string padding = std::string(size_t(content_padding_size), ' '); + stream.write(padding.c_str(), std::streamsize(padding.size())); + } + if (binBuffer.size() > 0) { + // BIN chunk info, then BIN data + const uint32_t bin_length = uint32_t(binBuffer.size()) + bin_padding_size; + const uint32_t bin_format = 0x004e4942; + stream.write(reinterpret_cast(&bin_length), + sizeof(bin_length)); + stream.write(reinterpret_cast(&bin_format), + sizeof(bin_format)); + stream.write(reinterpret_cast(binBuffer.data()), + std::streamsize(binBuffer.size())); + // Chunksize must be multiplies of 4, so pad with zeroes + if (bin_padding_size > 0) { + const std::vector padding = + std::vector(size_t(bin_padding_size), 0); + stream.write(reinterpret_cast(padding.data()), + std::streamsize(padding.size())); + } + } +} + +static void WriteBinaryGltfFile(const std::string &output, + const std::string &content, + const std::vector &binBuffer) { +#ifdef _WIN32 +#if defined(_MSC_VER) + std::ofstream gltfFile(UTF8ToWchar(output).c_str(), std::ios::binary); +#elif defined(__GLIBCXX__) + int file_descriptor = _wopen(UTF8ToWchar(output).c_str(), + _O_CREAT | _O_WRONLY | _O_TRUNC | _O_BINARY); + __gnu_cxx::stdio_filebuf wfile_buf( + file_descriptor, std::ios_base::out | std::ios_base::binary); + std::ostream gltfFile(&wfile_buf); +#else + std::ofstream gltfFile(output.c_str(), std::ios::binary); +#endif +#else + std::ofstream gltfFile(output.c_str(), std::ios::binary); +#endif + WriteBinaryGltfStream(gltfFile, content, binBuffer); +} + +bool TinyGLTF::WriteGltfSceneToStream(Model *model, std::ostream &stream, + bool prettyPrint = true, + bool writeBinary = false) { + JsonDocument output; + + /// Serialize all properties except buffers and images. + SerializeGltfModel(model, output); + + // BUFFERS + std::vector binBuffer; + if (model->buffers.size()) { + json buffers; + JsonReserveArray(buffers, model->buffers.size()); + for (unsigned int i = 0; i < model->buffers.size(); ++i) { + json buffer; + if (writeBinary && i == 0 && model->buffers[i].uri.empty()) { + SerializeGltfBufferBin(model->buffers[i], buffer, binBuffer); + } else { + SerializeGltfBuffer(model->buffers[i], buffer); + } + JsonPushBack(buffers, std::move(buffer)); + } + JsonAddMember(output, "buffers", std::move(buffers)); + } + + // IMAGES + if (model->images.size()) { + json images; + JsonReserveArray(images, model->images.size()); + for (unsigned int i = 0; i < model->images.size(); ++i) { + json image; + + std::string dummystring = ""; + // UpdateImageObject need baseDir but only uses it if embeddedImages is + // enabled, since we won't write separate images when writing to a stream + // we + UpdateImageObject(model->images[i], dummystring, int(i), false, + &this->WriteImageData, this->write_image_user_data_); + SerializeGltfImage(model->images[i], image); + JsonPushBack(images, std::move(image)); + } + JsonAddMember(output, "images", std::move(images)); + } + + if (writeBinary) { + WriteBinaryGltfStream(stream, JsonToString(output), binBuffer); + } else { + WriteGltfStream(stream, JsonToString(output, prettyPrint ? 2 : -1)); + } + + return true; +} + +bool TinyGLTF::WriteGltfSceneToFile(Model *model, const std::string &filename, + bool embedImages = false, + bool embedBuffers = false, + bool prettyPrint = true, + bool writeBinary = false) { + JsonDocument output; + std::string defaultBinFilename = GetBaseFilename(filename); + std::string defaultBinFileExt = ".bin"; + std::string::size_type pos = + defaultBinFilename.rfind('.', defaultBinFilename.length()); + + if (pos != std::string::npos) { + defaultBinFilename = defaultBinFilename.substr(0, pos); + } + std::string baseDir = GetBaseDir(filename); + if (baseDir.empty()) { + baseDir = "./"; + } + /// Serialize all properties except buffers and images. + SerializeGltfModel(model, output); + + // BUFFERS + std::vector usedUris; + std::vector binBuffer; + if (model->buffers.size()) { + json buffers; + JsonReserveArray(buffers, model->buffers.size()); + for (unsigned int i = 0; i < model->buffers.size(); ++i) { + json buffer; + if (writeBinary && i == 0 && model->buffers[i].uri.empty()) { + SerializeGltfBufferBin(model->buffers[i], buffer, binBuffer); + } else if (embedBuffers) { + SerializeGltfBuffer(model->buffers[i], buffer); + } else { + std::string binSavePath; + std::string binUri; + if (!model->buffers[i].uri.empty() && + !IsDataURI(model->buffers[i].uri)) { + binUri = model->buffers[i].uri; + } else { + binUri = defaultBinFilename + defaultBinFileExt; + bool inUse = true; + int numUsed = 0; + while (inUse) { + inUse = false; + for (const std::string &usedName : usedUris) { + if (binUri.compare(usedName) != 0) continue; + inUse = true; + binUri = defaultBinFilename + std::to_string(numUsed++) + + defaultBinFileExt; + break; + } + } + } + usedUris.push_back(binUri); + binSavePath = JoinPath(baseDir, binUri); + if (!SerializeGltfBuffer(model->buffers[i], buffer, binSavePath, + binUri)) { + return false; + } + } + JsonPushBack(buffers, std::move(buffer)); + } + JsonAddMember(output, "buffers", std::move(buffers)); + } + + // IMAGES + if (model->images.size()) { + json images; + JsonReserveArray(images, model->images.size()); + for (unsigned int i = 0; i < model->images.size(); ++i) { + json image; + + UpdateImageObject(model->images[i], baseDir, int(i), embedImages, + &this->WriteImageData, this->write_image_user_data_); + SerializeGltfImage(model->images[i], image); + JsonPushBack(images, std::move(image)); + } + JsonAddMember(output, "images", std::move(images)); + } + + if (writeBinary) { + WriteBinaryGltfFile(filename, JsonToString(output), binBuffer); + } else { + WriteGltfFile(filename, JsonToString(output, (prettyPrint ? 2 : -1))); + } + + return true; +} + +} // namespace tinygltf + +#ifdef __clang__ +#pragma clang diagnostic pop +#endif + +#endif // TINYGLTF_IMPLEMENTATION \ No newline at end of file diff --git a/tools/CMakeLists.txt b/tools/CMakeLists.txt index 900f43bd2c..678f90c5fe 100644 --- a/tools/CMakeLists.txt +++ b/tools/CMakeLists.txt @@ -1,4 +1,5 @@ add_subdirectory(level_tools) +add_subdirectory(build_level) add_executable(dgo_unpacker dgo_unpacker.cpp) diff --git a/tools/build_level/CMakeLists.txt b/tools/build_level/CMakeLists.txt new file mode 100644 index 0000000000..03bca07db3 --- /dev/null +++ b/tools/build_level/CMakeLists.txt @@ -0,0 +1,4 @@ +add_executable(build_level + main.cpp) + +target_link_libraries(build_level common compiler tiny_gltf) \ No newline at end of file diff --git a/tools/build_level/main.cpp b/tools/build_level/main.cpp new file mode 100644 index 0000000000..d269c89436 --- /dev/null +++ b/tools/build_level/main.cpp @@ -0,0 +1,3 @@ +int main() { + return 0; +} \ No newline at end of file